iShoot IS-C720XB tripod mount ring (metal) is designed for lenses listed below (please check model carefully), EF 70-200mm f/2.8L USM, EF 70-200mm f/2.8L IS USM, EF 70-200mm f/2.8L IS II USM, EF 100-400mm f/4.5-5.6L IS USM, EF 35-350mm f/3.5-5.6L USM, EF 300mm f/4L IS USM. The tripod mount ring also features a arca-type interface so it can be mounted directly on any standard arca-swiss compatible ball heads or clamps. By using a tripod mount ring you can normally get better stability and therefore get better pictures, for the mount ring provides a better balance and stabilisation.
1 x iShoot C720XB Tripod Mount Ring for Canon 70-200 f/2.8L USM, 70-200 f/2.8L IS USM