Ishoot Improved 80mm Lens Collar Tripod Mount Ring Quick Release Plate for Canon EF 70-300mm f/4-5.6l is USM & EF 28-300mm f/3.5-5.6l IS USM.

All Metal Tripod Mount Ring IS-C730PB
For Canon EF 28-300mm f/3.5-5.6l IS USM Lens
and Canon EF 70-300mm f/4-5.6l is USM Lens.
Bottom is Arca. Fit Quick Release Plate Feature
Compatible with Ball Head of RRS / Arca-Swiss / Kirk Fit
FEATURES: 1. The Lens Support is Reference to and Modified From Original Standard Design ved, And added the Features of Quick Release Plate, More Practical;
2. The Lens Collar is Made of Aviation Aluminum, CNC Precisly Machined, Surface Anodic Oxidation; Split Structure, Built-in Anti-Skid Patch, Copper Knob, Stainless Steel Anti-Skid Nails;
3. The Weight of the Tripod Mount Ring is about 165g, Inner Diameter is about 80mm, Ring Width is about18mm; Bottom Quick Release Plate is about 76mm Long, with 1/4 "and 3/8" Screw Holes;
4.Quick Release Plate is as 39mm Standard, Compatible with RRS / Arca-Swimberley / Swimberley / Sunways / Kangrinpoche / Benro / Sirui / Marsace / Ishoot Ball Head of Arca 39mm Fit, Suitable for Ishoot Is-JZ30 / IS-JZ64 / IS-QJ64 / IS-QJ64-FD / / I-JZ60BK / IS-JZ70MFT / IS-JZ80BK. Applicable to Canon Lenses: Canon EF 28-300mm f/3.5-5.6L IS USM Lens
Canon EF 70-300mm f/4-5.6l is USM Lens. Package Including: 1 x Ishoot Lens Collar Support Tripod Mount Ring IS-C730PB