Arca-Swiss design, It fits all the Arca-type quick release adapters, which are made by many different companies such as Acratech, Arca-Swiss, Foba, Graf/Studioball, Gitzo, Novoflex, NPC and Wimberley. * This LP Series quick release plate for lenses is made of satin black anodized aluminum, with anti-twist flanges to trace the edges of the lens" tripod collar. * Dual Safety Stops. The safety stops at the front & back of the lens plate prohibit your lens from accidentally slipping out of the quick release adapter(easily removed with supplied hex wrench if desired). * Works with All Common Flash Brackets. Drilled holes accept flash arms from Kirk & Really Right Stuff. Dimension (H x L x W) : 11.80MM x 100.45MM x 38.10 mm * Compatible to following lens Canon 100MM Macro w/ Collar, 28-300MM IS, 35-350MM, 70-200MM F2.8, 80-200MM F2.8, 100-400MM, 180MM Macro, 200MM F1.8, 200MM F2.0, 200MM F2.8 w/ opt. Collar, 300MM F4.0 IS, 300MM F2.8, 400MM F5.6 400MM F4.0 DO etc