The tripod mount ring is specially made for EF 70-200mm f/4L Lens, EF 70-200mm f/4L IS Lens, EF 70-200mm f/4L IS II Lens, EF 400mm f/5.6L Lens, EF 80-200mm f/2.8L Lens<br> The lens collar is referencing to and modified from original standard design, bearing is enhanced, details are improved, and added the features of quick release plate<br> High temperature die casting molding of metal, CNC processing, car paint on . Built-in film, copper knob and stainless steel anti-skid nails<br> The this lens support bracket inner diameter is about 65.5mm, width is about 18mm; split-structure, bottom is 60mm length quick release plate, with 1/4inch and 3/8inch screw holes<br> The lens holder bottom is 39mm Arca fit Quick Release Plate, Compatible with / Arca / / / / / / MARSACE / tripod ball head of Arca 39mm fit<br> colour: creamy-white<br> Material: metal<br> Package Contents:<br> 1 x Tripod Mount Ring<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.