ITEM NAME:50x120mm Aluminum Quick Release QR Plate - Telephoto Lens Bracket for Description: Telephoto lens support holder 50x120mm. Installed between long-focus lens and camera body, sharing the weight of the camera mount to protect long-focus lens and camera mount from damage, but also increase stability. Equipped with 1 bubble levels, comes with 3/8 and 1/4 double screw connection. Aluminum materials, CNC precision machining, surface oxidation treatment. compatible for Arca-Swiss type mount. Specification: Material: Aluminum Alloy Size: 120x50mm Color:Black Screw Type: 1/4-inch Bottom Thread Type: 3/8-inch Package Includes: 1 Piece Telephoto Lens Holder Quick Release Plate SKU: FUZ0026465177010527.Material: Aluminum Alloy. Size: 120x50mm. compatible for Arca-Swiss type mount.