iShoot Tripod Mount Ring Lens Collar Support Compatible with Canon EF 70-200mm f/2.8L IS/II/III USM, 100-400mm f/4.5-5.6L IS 300mm f/4L USM Lens, Built-in Arca-Swiss Type Quick Release Plate

The lens support is referencing to and modified from Canon original standard design, bearing is enhanced, details are improved, and added the features of quick release plate, more practical; The lens collar is made of Aviation Aluminum, CNC precisely machined, surface anodic oxidation; integrated structure, built-in anti-skid patch, copper knob, stainless steel anti-skid nails; The net weight of the tripod mount ring is about 135g, inner diameter is about 78mm, the ring width is about 18mm; Bottom is 65mm length quick release plate, with 1/4" and 3/8" screw holes; Quick release plate is AS 39mm standard, compatible with RRS / ARCA-SWISS / KIRK / WIMBERLEY / MARKINS / SUNWAYFOTO / KANGRINPOCHE / BENRO / SIRUI / MARSACE / ISHOOT ball head of Arca 39mm fit, suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK.