Functions: Suitable for Nikon 80-200mm F2.8 AFS lens. Aluminum alloy structure, anti-corrosion and light weight, durable to use. 81mm inner diameter, great compatibility, easy to install with a clamping screw and convenient to use. It helps to fix and balance a telephoto lens that is heavy or long hanging in front of the camera. Nice accessory for photography lovers, providing a better shooting experience. Specification: Item Type: Lens Tripod Mount Ring Material: aluminum alloy Black colour Efficiency: for Nikon 80-200 mm F2.8 AFS lens Inner Diameter: Approx. 81 mm / 3.2 inch Weight: approx. 165g Packing List: 1 x Lens Tripod Mounting Ring Other items in the photos are not included. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.