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 life. The lens ring is designed in one piece, the inner wall is designed with grooves and mounting positions, and a protective plastic film is attached, non-slip design locking knob. The plate length is about 52 mm, built-in Arca standard quick release plate for tripod head, equipped with 1/4" and 3/8" screw holes, and stainless steel non-slip screws, allows you to attach the lens to a tripod directly. The lens support bottom is 39mm standard RRS interface plate, for RRS / ARCA-SWISS / GROUP / WIMBERLEY / MARKINS /SUNWAYFOTO / BENRO tripod ball head, pan head and clamp. Specifications: Material: aluminum alloy Black color Lens inner diameter: about 70 mm, width: about 18 mm Plate length: about 52 mm/2.05" Applicable model: for Z Mount 24-200 mm f/4-6.3 VR and Z Mount DX 50-250 mm f/4.5-6.3 VR lenses Package includes: 1 pc IS-Z24200 Tripod Mount Ring