Feature: 1. Compatibility: This tripod collar mount ring is specifically designed for 18-300mm F3.5-6.3 lens, providing stable support. This enhances your photography experience. 2. Aluminum Alloy Construction: Made from aviation grade aluminum alloy, CNC machining ensures the lens tripod mount ring is sturdy and rusting resistant for long lasting use. 3. For Arca Compatible: The bottom of the lens collar includes a quick release plate of 70mm 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 contacting 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 rotated like the original tripod ring. Specification: Item Type: Tripod Collar Mount Ring Material: Aluminum Alloy Quick Release Plate Length: 70mm / 2.8in. Package List: 1 x Tripod Collar Mount Ring1 x Wrench