Features: 480mm long extended quick release plate with 38mm wide double dovetail base, compatible with Arca-Swiss standard clamp. Designed with 1/4" & 3/8" screw holes, can be installed to tripods with 1/4" or 3/8" screw easily. 2 standard QR plate with 1/4" screw, allows you to 2 cameras/ 1 camera + 1 speedlite on one tripod simultaneously. The bobble level and anti-slip rubber pads ensure balanced, stable and safe usage. High-quality aluminum alloy material, using CNC machining technology, durable and wear-proof. Specifications: Material: aluminum alloy Length: 480mm / 18.9in Width: 38mm/ 1.5in Item Weight: 566g / 1.1lbs Package Size: 53.5 * 7 * 7cm / 21.1 * 2.8 * 2.8in Package Weight: 700g / 1.5lbs Package List: 1 * Quick Release Plate