Di02-R1064-25x36 25.2mm x 35.6 mm; 1064nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R442-25x36 25.2mm x 35.6 mm; 442nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R488-25x36 25.2mm x 35.6 mm; 488nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R532-25x36 25.2mm x 35.6 mm; 532nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R561-25x36 25.2mm x 35.6 mm; 561nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R594-25x36 25.2mm x 35.6 mm; 594nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R635-25x36 25.2mm x 35.6 mm; 635nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di02-R785-25x36 25.2mm x 35.6 mm; 785nm Laser BrightLine Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R405-t1-25x36 25.2mm x 35.6 mm; 405nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R442-t1-25x36 25.2mm x 35.6 mm; 442nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R488-t1-25x36 25.2mm x 35.6 mm; 488nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R488-t3-25x36 25.2mm x 35.6 mm; 488nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R514-t1-25x36 25.2mm x 35.6 mm; 514nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R532-t1-25x36 25.2mm x 35.6 mm; 532nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R532-t3-25x36 25.2mm x 35.6 mm; 532nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R594-t3-25x36 25.2mm x 35.6 mm; 594nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R635-t1-25x36 25.2mm x 35.6 mm; 635nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R660-t1-25x36 25.2mm x 35.6 mm; 660nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R685-t1-25x36 25.2mm x 35.6 mm; 685nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R785-t1-25x36 25.2mm x 35.6 mm; 785nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF347-Di01-25x36 25.2mm x 35.6 mm; 347nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF365-Di01-25x36 25.2mm x 35.6 mm; 365nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF376-Di01-25x36 25.2mm x 35.6 mm; 376nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF389-Di01-25x36x1.5 25.2mm x 35.6 mm; 389nm Edge BrightLine Single-Edge image-splitting Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF390-Di01-25x36 25.2mm x 35.6 mm; 390nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF409-Di03-25x36 25.2mm x 35.6 mm; 409nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF414-Di01-25x36 25.2mm x 35.6 mm; 414nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF416-Di01-25x36 25.2mm x 35.6 mm; 416nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF484-FDi01-25x36 25.2mm x 35.6 mm; 484nm Edge BrightLine Single-Edge image-splitting Dichroic Beamsplitter for standard microscopy | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF484-FDi02-t3-25x36 25.2mm x 35.6 mm; 484nm Edge BrightLine Single-Edge image-splitting Dichroic Beamsplitter for super-resolution microscop | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF497-Di01-25x36 25.2mm x 35.6 mm; 497nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF500-Di01-25x36 25.2mm x 35.6 mm; 500nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF506-Di03-25x36 25.2mm x 35.6 mm; 506nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF509-FDi02-t3-25x36 25.2mm x 35.6 mm; 509nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF520-Di02-25x36 25.2mm x 35.6 mm; 520nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF526-Di01-25x36 25.2mm x 35.6 mm; 526nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF552-Di02-25x36 25.2mm x 35.6 mm; 552nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF570-Di01-25x36 25.2mm x 35.6 mm; 570nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF573-Di01-25x36 25.2mm x 35.6 mm; 573nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF585-Di01-25x36 25.2mm x 35.6 mm; 585nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF593-Di03-25x36 25.2mm x 35.6 mm; 593nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF596-Di01-25x36 25.2mm x 35.6 mm; 596nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF605-Di02-25x36 25.2mm x 35.6 mm; 605nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF640-FDi01-25x36 25.2mm x 35.6 mm; 640nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF640-FDi02-t3-25x36 25.2mm x 35.6 mm; 640nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF648-Di01-25x36 25.2mm x 35.6 mm; 648nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF650-Di01-25x36 25.2mm x 35.6 mm; 650nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF660-Di02-25x36 25.2mm x 35.6 mm; 660nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF665-Di02-25x36 25.2mm x 35.6 mm; 665nm Edge BrightLine multiphoton Single-Edge Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF677-Di01-25x36 25.2mm x 35.6 mm; 677nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF685-Di02-25x36 25.2mm x 35.6 mm; 685nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF695-Di01-25x36 25.2mm x 35.6 mm; 695nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF705-Di01-25x36 25.2mm x 35.6 mm; 705nm Edge BrightLine multiphoton Single-Edge Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF735-Di02-25x36 25.2mm x 35.6 mm; 735nm Edge BrightLine multiphoton Single-Edge Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF740-Di01-25x36 25.2mm x 35.6 mm; 740nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF765-Di01-25x36x2.0 25.2mm x 35.6 mm; 765nm Edge BrightLine Single-Edge image-splitting Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF775-Di01-25x36 25.2mm x 35.6 mm; 775nm Edge BrightLine multiphoton Single-Edge Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF850-Di01-t1-25x36 25.2mm x 35.6 mm; 850nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF872-Di01-25x36x2.0 25.2mm x 35.6 mm; 872nm Edge BrightLine Single-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF925-Di01-25x36 25.2mm x 35.6 mm; 925nm Edge BrightLine multiphoton Single-Edge Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF980-Di01-t1-25x36 25.2mm x 35.6 mm; 980nm Edge BrightLine multiphoton Single-Edge Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LPD01-355RU-25x36x2.0 25.2mm x 35.6 mm; 355nm RazorEdge Dichroic Laser Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LPD01-514RU-25x36x2.0 25.2mm x 35.6 mm; 514.5nm RazorEdge Dichroic Laser-flat Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LPD02-1064RU-25x36x2.0 25.2mm x 35.6 mm; 1064nm RazorEdge Dichroic Laser Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LPD02-488RU-25x36x1.1 25.2mm x 35.6 mm; 488nm RazorEdge Dichroic Laser Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LPD02-830RU-25x36x1.1 25.2mm x 35.6 mm; 830nm RazorEdge Dichroic Laser Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LPD02-830RU-25x36x2.0 25.2mm x 35.6 mm; 830nm RazorEdge Dichroic Laser Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-T488-13x15x0.5 13 mm x 15 mm0; 488nm Yokogawa Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF496-SDi01-25x36x2.0 25.2mm x 35.6 mm; 496nm Edge BrightLine Single-Edge Short-Pass Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF505-SDi01-25x36 25.2mm x 35.6 mm; 505nm Edge BrightLine Single-Edge Standard epi-Fluorescence Short-Pass Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF535-SDi01-25x36 25.2mm x 35.6 mm; 535nm Edge BrightLine Single-Edge Short-Pass Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF556-SDi01-25x36 25.2mm x 35.6 mm; 556nm Edge BrightLine Single-Edge Short-Pass Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF625-SDi01-25x36 25.2mm x 35.6 mm; 625nm Edge BrightLine Single-Edge Short-Pass Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF653-SDi01-25x36 25.2mm x 35.6 mm; 653nm Edge BrightLine Single-Edge Short-Pass Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF720-SDi01-25x36 25.2mm x 35.6 mm; 720nm Edge BrightLine multiphoton Short-Pass Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF749-SDi01-25x36x3.0 25.2mm x 35.6 mm; 749nm Edge BrightLine Single-Edge Short-Pass image-splitting Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF825-SDi01-25x36x2.0 25.2mm x 35.6 mm; 825nm Edge BrightLine Single-Edge Short-Pass image-splitting Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF835-SDi01-t1-25x36 25.2mm x 35.6 mm; 835nm BrightLine multiphoton 3P Short-Pass super-resolution / TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
NFD01-405-25x36 25.2mm x 35.6 mm; 405nm StopLine Notch Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
NFD01-532-25x36 25.2mm x 35.6 mm; 532nm StopLine Notch Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-R405/488/532/635-25x36 25.2mm x 35.6 mm; 405/488/532/635nm Lasers BrightLine Quad-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-R405/488/594-25x36 25.2mm x 35.6 mm; 405/488/594nm Lasers BrightLine Triple-Edge laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-R488/543/594-25x36 25.2mm x 35.6 mm; 488/543/594nm Lasers BrightLine Triple-Edge laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-R488/561-25x36 25.2mm x 35.6 mm; 488/561nm Lasers BrightLine Dual-Edge laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-T405/488/561-13x15x0.5 13 mm x 15 mm; 405/488/561nm Yokogawa Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di01-T405/488/568/647-13x15x0.5 13 mm x 15 mm; 405/488/568/647nm Yokogawa Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R405/488/532/635-t1-25x36 25.2mm x 35.6 mm; 405/488/532/635nm Lasers BrightLine quad-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R488/561-t3-25x36 25.2mm x 35.6 mm; 488/561nm Lasers BrightLine Dual-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF395/495/610-Di01-25x36 25.2mm x 35.6 mm; 395/495/610nm BrightLine Triple-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF403/502-Di01-25x36 25.2mm x 35.6 mm; 403/502nm BrightLine Dual-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF408/504/581/667/762-Di01-25x36 25.2mm x 35.6 mm; 408/504/581/667/762nm BrightLine penta-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF409/493/573/652-Di02-25x36 25.2mm x 35.6 mm; 409/493/573/652nm BrightLine quad-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF421/491/567/659/776-Di01-25x36 25.2mm x 35.6 mm; 421/491/567/659/776nm BrightLine penta-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF436/514/604-Di01-25x36 22mm x 29 mm; 436/514/604nm BrightLine Triple-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF444/521/608-Di01-25x36 22mm x 29 mm; 444/521/608nm BrightLine Triple-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF459/526/596-Di01-25x36 22mm x 29 mm; 459/526/596nm BrightLine Triple-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
FF545/650-Di01-25x36 25.2mm x 35.6 mm; 545/650nm BrightLine Dual-Edge Standard epi-Fluorescence Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
Di03-R685-t3-25x36 25.2mm x 35.6 mm; 685nm Laser BrightLine Single-Edge super-resolution /TIRF Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Rectangular |
LM01-427-25 25 mm Dia. 427nm Edge LaserMUX Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Circular |
LM01-480-25 25 mm Dia. 480nm Edge LaserMUX Single-Edge Laser Dichroic Beamsplitter | Optics | Beam Splitter | Thin BS | Semrock | UVFS | Circular |