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 LensThe lens is referencing to and modified from original standard design, is enhanced, details are improved, and added the features of quick release plateHigh temperature die casting molding of metal, processing, car paint on surface. Built-in film, copper knob and stainless steel anti-skid 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 holesThe lens holder bottom is 39mm -Swiss fit Quick Release Plate, Compatible with / -SWISS / / / / / / MARSACE / tripod ball head of 39mm fitcolour: creamy-whiteMaterial: metalPackage Contents:1 x Tripod Mount RingOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.