1.[Universal Fitment]: With 1/4'-20 , 3/8'-16 threaded Hole, an 86mm ring diameter, and thumbscrew, this Lens Collar Replacement Foot is suitable for various lens models, including for 35-150mm F/2-2.8 Di III VXD (A058), for E Port, for Z Ports as well as for 100-400mm F5-6.3 DG HSM 2.[Enhanced Stability and Balance]: The tripod mount ring is designed to provide enhanced stability and balance for your telephoto lens, especially when dealing with heavy or long lenses that extend from the front of the camera 3.[Compatibility]: This Tripod Mount Ring Stand Base is fit for most lenses and features a construction that matches specifications, ensuring seamless integration with your existing gear 4.[Compact Dimensions]: Measuring 3.8cmx7cmx12.4cm with packaging dimensions of 15cmx11cmx10cm, this Lens Collar Support Holder Bracket is compact yet efficient, making it easy to transport while providing essential support during photography