Aluminium Alloy Quick Release Clamp with 1/4 & 3/8 Inch Screw Mount Bubble Level for Ballhead Tripods Camera Accessories for Arca Swiss Benro Acratech Kirk Wimberley Gitzo Manfrotto RRS QR Plate Features: With 3/8 inch screw hole and 3/8 inch to 1/4 inch convertible screw, can be connected to various ballheads, tripods, etc. Meets standard Arca type, suitable for most of quick release plates, such as ARCA-SWISS, RRS, KIRK, SUNWAYFOTO, etc. Built-in bubble level, for accurate balancing; Knob operation design, easy to operate. With laser engraving scales on both sides, can be identified easily. Made of aluminium alloy material, adopt CNC processing, surface oxidation treatment,, sturdy and durable. Specifications: Material: Aluminium Alloy Color: Black Screw Hole: 1/4 & 3/8 Item Size: 7.3 * 3.6 * 1.3cm / 2.9 * 1.4 * 0.5in Item Weight: 60g / 2.1oz Package Size: 9.5 * 7.5 * 3.5cm / 3.7 * 3 * 1.4in Package Weight: 77g / 2.7oz Note: Only the quick release clamp is included. Package List: 1 * Quick Release Clamp(with a convertible screw)