Specification Brand : Tangxi BulletPoint1 : AS STANDARD: On the bottom is a 70mm quick release plate with 1/4inch and 3/8inch screw holes and for Arca port, which is compatible with tripod ball heads, panoramic tripod heads and clamps. BulletPoint2 : COMPATIBILITY: It is designed for RF70-200 F2.8L lens, which helps to better balance the camera and lens on a tripod and remove the lens from the camera body. BulletPoint3 : QUICK MOUNTING AND UNMOUNTING: Rotate the lens to secure it by matching the mounting markings on the tripod mount ring to the mounting markings on the lens. BulletPoint4 : STABLE AND RELIABLE: It can be mounted on a tripod to help users fix and balance heavy telephoto lenses. This design ensures stability and security during shooting. BulletPoint5 : MATERIAL: Features an 82mm inner diameter and light weight. Made of aluminum alloy, CNC machined, hollowed out to reduce weight, sanded and polished, anodized surface processing, as well as built in anti slip stickers to effectively the lens from scratches. Color : GD3 CpsiaCautionaryStatement : no_warning_applicable Department : Unisex Adult GemType : No Gemstone ItemName : Tripod Mount Ring, Aluminum Alloy Lens Collar with Quick Release Plate, 82mm Inner Diameter, for RF70-200 F2.8L Lens, with 1/4inch 3/8inch Screw Hole for Arca Port ItemPackageDimensions_Height : 9 centimeters ItemPackageDimensions_Length : 14 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : tripod-lens-mount-rings Manufacturer : Tangxi Material : Copper MetalType : Copper ModelName : Tangxiyk59rm2qap ModelNumber : Tangxiyk59rm2qap PartNumber : Tangxiyk59rm2qap Pattern : Solid ProductDescription : Specification: Item Type: Tripod Mount Ring Material: Aluminum Alloy Weight: Approx. 237g / 8.4oz Applicable Model: For RF70-200 F2.8L Lens Inner Diameter: 82mm / 3.23in