Features 1、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. 2、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. 3、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. 4、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. 5、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 protect the lens from scratches. 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 Package List 1 x Tripod Mount Ring 1 x Wrench