Feature: 1. Applicable Lenses: Lens collar tripod mount ring is suitable for 100‑400mm F5‑6.3 DG DN OS (E/L Mount) Lens, for 105mm F/1.4 DG HSM Art Lens, for FE Mount. 2. Quick Mount Plate: At the bottom of the lens ring is an 80mm quick mount plate with built in for Arca mount, 1/4 inch and 3/8 inch screw holes, compatible with tripod ball heads, panoramic ball heads, and fixtures. 3. Installing On A Tripod: The metal lens collar tripod mount ring is installed on a tripod, which can help you fix and balance your telephoto lens. 4. Aluminum Alloy Material: Lens collar tripod mount ring is made of aluminum alloy material, accuracy machined, lightweight, and easy to carry. 5. Anti Slip Patch: Built in anti slip patch to protect your lens and ensure smoother rotation, providing you great using experience. Specification: Item Type: Lens Collar Tripod Mount Ring Material: Aluminum Alloy Weight: Approx. 227g / 8.0oz Interface: 1/4 Inch Screw Hole, 3/8 Inch Screw Hole, for Arca Mount Applicable Lenses: for 100-400mm F5-6.3 DG DN OS (E/L Mount) Lens, for 105mm F/1.4 DG HSM Art Lens for FE Mount. Package List: 1 x Lens Collar Tripod Mount Ring