iShoot Lens Collar Tripod Mount Ring IS-RF720 for Canon RF 70-200mm f/2.8L IS USM Bottom is ARCA Fit Quick Release Plate Feature Compatible with Tripod Ball Head of RRS / ARCA-SWISS Fit Main features: 1. The tripod mount ring is tailor-made for Canon RF 70-200mm f/2.8L IS USM Lens, can't be used for other lenses?the inner diameter is about 81.5 mm, the width is about 13.5mm, net weight is about 165g; 2. The lens collar adopts original E(III) standard design, split structure, the inner wall is grooved, and the 3M plastic film is attached to reduce wear; the knob has the same function as the original factory, and the knob is screwed to the end to unlock; 3. The tripod collar bottom is added 70mm long Arca fit quick release plate feature, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate; also reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screw for fixing lens to tripod directly? 4. The lens collar is made of high-density Aviation Aluminum, lightweight and solid; precisely machined by world-class high-end CNC turning center; hollowed-out work processed by Multi-Diamond Cutter finely; 5. The tripod mount ring surface using vibration polishing technology, grinding precision improved, multiple anodized, the fineness and uniformity of the color of the metal surface greatly improved; the appearance and exquisite workmanship is much better than similar products made by mold. Applicable to: Canon RF 70-200mm f/2.8L IS USM Can't be used for other lenses Package Includes: 1 x iShoot Tripod Mount Ring IS-RF720 for Canon RF 70-200mm f/2.8L IS USM Lens (Note: The other items in the photos not listed here are for illustrating only, not included)