Feature:1. Compatibility: This lens collar tripod mount ring is specifically designed for Nikkor Z 180600mm f/5.66.3 VR Lens, providing stable support and balance. This enhances your photography experience by ensuring reliable, secure support.2. Aluminum Alloy Construction: Made from aviation grade aluminum alloy, CNC machining ensures the lens tripod mount ring is sturdy and rust resistant for long lasting use.3. For Arca Compatible: The bottom of the lens collar ring includes a quick release plate of 80mm with 1/4 inch and 3/8 inch screw holes compatible for Arca tripod ball heads, panoramic heads, and clamps.4. High Stability and Balance: The tripod mount ring mount on the tripod, it helps you fix and balance your tele lens which is heavy or long lens hanging off the front of camera.5. Easy Install: The contact surface is protected and will not wear lens surface when installed correctly, there should be no stickers on the lens surface installation position, if there is, remove it, otherwise it will affect the normal installation, after installation, it can be freely rotated like the original tripod ring.Specification:Item Type: Lens CollarMaterial: Aluminum AlloyMount Type: 1/4 Inch Thread, 3/8 Inch ThreadCompatible Lens: for Nikkor Z 180-600mm f/5.6-6.3 VRQuick Release Plate Length: 80mm / 3.1in.Package List:1 x Lens Collar 1 x L Type Hex Wrench