Condition: 100% brand new Item type: Lens Collar Base Foot Material: aluminium alloy Color: silver Size: Approx. 82x38x30mm/3.2x1.5x1.2in Weight: Approx. 113g Interface: standard 1/4 inch screw hole, 1/4 inch screw 1Made of aviation?grade aluminum alloy, CNC precise machining, polishing, and surface anodizing treatment. 2With non?slip rubber and 1/4 inch screws and springs. 3Refer to the original factory structure design, increase the function of finger position and quick release plate. 4The tripod ring quick release plate adopts for ASRRS standard/for ARCA-SWISS and other ballhead. 5Reserved standard 1/4 inch screw holes at the bottom for strong expandability. 6Suitable for Canon 100?400mmf4.5?5.6L ISII lens.1 x LensCollarBaseFoot 1 x Wrench