Metal Tripod Collar Mount Ring for Canon EF 70-300Mm F/4-5.6L IS USM L Telephoto
Compatibility: For Canon EF 70-300mm f/4-5.6L IS USM. -- Make it convenient for you to adjust the lens after fixing on tripod. 1 Tripod Collar Mount Ring. -- With a 1/4" female screw on the bottom.