Features: Made of high quality aluminum alloy, CNC precision machining, which makes it durable and abrasion-resistant. Built-in high contrast bubble levels, make your photography more precise. Two sides have the 0-15cm scale, making the moving more accurate. With 1/4" screw mount on the top quick release plate, it is suitable for all DSLR/ILDC cameras with 1/4" screw hole. Safe screws installed in both sides can effectively prevent your camera from dropping by accident. With the female thread of UNC1/4" standard, the width of the dovetail groove in the bottom is about 33mm. Adopts for Arca Swiss standard, compatible for Arca Swiss standard quick release plates & clamps, ball heads and tripods, such as for RSS, for Arca-Swiss, for Kirk, for Wimberley, for Markins, for Sirui, for SUNWAYFOTO, for Benro, etc. Specifications: : Andoer Model: BPL-180 Material: Aluminum alloy Color: Black Mounting Screw: 1/4" Compatible: For Arca Swiss standard all quick release plates & clamps, ball heads and tripods Long Quick Release Plate Length: 180mm Long Quick Release Plate Width: 38mm Double-layer Clamp Length: 50mm Double-layer Clamp Width: 50mm Item Weight: 333g / 11.7oz Package Size: 23 * 12.2 * 6.5cm / 9.1 * 4.8 * 2.6in Package Weight: 410g / 14.5oz Package List: 1 * BPL-180 Long Quick Release Plate & Double-layer Clamp Kit