Features: IS-Z24200 Tripod mount ring, for Z Mount 24-200mm f/4-6.3 VR and Z Mount DX 50-250mm f/4.5-6.3 VR lenses. Made of aviation aluminum material, precision CNC machining, lightweight hollow design, polished and anodized finish on the surface, exquisite workmanship and durable for long service life. Lens ring is integrally formed, the inner wall is designed with grooves and installation positions, and a plastic protective film is attached, non-slip design locking knob. Plate length is about 52mm, built-in Arca standard quick release plate for tripod for head, equipped with 1/4" and 3/8" screw holes, and stainless-steel anti-slip screws, allows you to fix the lens to the tripod directly. Lens support bottom is 39mm standard RRS interface quick release plate, for RRS / ARCA-SWISS / GROUP / WIMBERLEY / MARKINS /SUNWAYFOTO / BENRO tripod ballhead, pan for head and clamp. Specifications: Material: Aluminum Alloy Color: Black Lens Inner Diameter: about 70mm, width: about 18mm Plate Length: about 52mm/2.05" Applicable Model: for Z Mount 24-200mm f/4-6.3 VR and Z Mount DX 50-250mm f/4.5-6.3 VR Lenses Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece IS-Z24200 Tripod Mount Ring