DSLRKIT Tripod Mount Ring B (W) for Canon 70-200mm f/2.8L is II USM & EF 100-400mm f/4.5-5.6L is USM
DSLRKIT
Best Value
JJC Tripod Collar Mount Ring, Compatible with Canon EF 70-200mm f/4L /EF 70-200mm f/4L is/EF 70-200mm f/4L is II USM Lens, Replaces Tripod Ring A-2
Fotasy
iShoot Tripod Mount Ring Base, Lens Collar Foot Support Stand Compatible with Canon RF 600mm F11 IS STM and Canon RF 800mm F11 IS STM, Lens Holder with 39mm Arca-Swiss Fit Quick Release Plate Dovetail
iShoot
RIEOMN Lens Collar Replacement Foot Tripod Mount Ring Stand Base Lens Case 19 x 32 cm
RIEOMN