Lens Collar Tripod Mount Ring for Canon EF 70-200mm f/2.8l is II/III USM, 100-400mm f/4.5-5.6l is USM, 35-350mm f/3.5-5.6l USM, 300mm f/4L IS USM.

All Metal Lens Tripod Mount Ring IS-C720XB
For Canon EF 70-200mm f /2.8l is III USM Lens and So On
Bottom is Arca Fit Quick RELEASE PLATE PLATE THE BALL HEAD OF OEAD OF RRS / Arca-Swiss / Kirk Fit
Features: 1. Reference to and Modified from Canon Original Standard Design, Bearing is Enhanced, Details Are Improved. The Lens Collar is Made of Aviation Aluminum, CNC Precisly Machined, Surface Anodic Oxidation; Integrated Structure, Built-in Anti-SKID PATCH, COPPER KNOB, Stainless Steel Anti-Skid Nails;
3. 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;
4. Quick Release Plate is AS 39mm Standard, Compaible with RRS / Arca-Swiss / Kirk / Wimberley / Markins / SunwayFoto / Kangrinpoche / Sirui / Marsace / Ishoot Ball Head of Arca 39M Fit Fites, SUUTALOT / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK. Applicable to Canon Lenses: Canon EF 70-200mm f/2.8l USM
Canon EF 70-200mm f/2.8L IS USM. -200mm f/2.8l is III USM
Canon EF 100-400mm f/4.5-5.6l is USM. USM
Not Suitable for Other Lens. Package Including: 1 x Ishoot Lens Collar Support Tripod Mount Ring Is-C720XB