Vello TC-N1 Tripod Collar for Nikon 70-200mm f/4 G Lens Professional Grade | Improves Tripod-Mounted Lens Balance Vertical Alignment Marks | Simple to Install and to Remove Rotates for Horizontal/Vertical Shooting | Thumbscrew Tightens and Loosens Ring Secure Fit Whats In The Box: 3/8"-1/4" Bushing, Limited 1-year Warranty