iShoot IS-C720XXB tripod mount ring (metal) is designed for below lenses:

Canon EF 70-200mm f/4L USM
Canon EF 70-200mm f/4L IS USM
Canon EF 400mm f/5.6 L USM
Canon EF 70-200mm f/4L IS II USM
Canon EF 80-200/2.8L

which replaces these original tripod collar models: A II (WII), A II (W), A II (B).

The tripod mount ring also features an 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 mounting ring provides a better balance and stabilisation.

Main features:

Made of aluminium by CNC precision machining, surface processed by anodic oxidation to avoid rust, with stainless steel screws, it only weighs approximately 135g
Compared to the original model, this mounting ring has an enhanced structure and an improved design, it features a convenient quick release plate interface
Tripod ring diameter is about 65.5mm. It has a 1/4'' and a 3/8'' screw holes.
For Canon EF 70-200mm f/4L USM, Canon EF 70-200mm f/4L IS USM, EF 400mm f/5.6 L USM, EF 70-200mm f/4L IS II USM and the EF 80-200/2.8L lens
Arca Swiss type quick release plate compatible with standard arca swiss type device and iShoot IS-JZ30, IS-JZ50, IS-JZ64, IS-QJ58, IS-QJ64, IS-QJ64-FD, IS-JZ60BK, IS-JZ70MFT, IS-JZ80BK

iShoot C720XXB Tripod Mount Ring for Canon 70-200 f/4 USM, 70-200 f/4 IS USM, EF 70-200mm f/4L IS II USM etc