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 34; screw mount on the top quick release plate,it is suitable for all DSLR/ILDC cameras with 1/4 34; screw hole.Safe screws installed in both sides can effectively prevent your camera from dropping by accident.With the female thread of UNC1/4 34; 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:Brand: AndoerModel: BPL-180Material: Aluminum alloyColor: BlackMounting Screw: 1/4 34;Compatible: For Arca Swiss standard all quick release plates clamps,ball heads and tripodsLong Quick Release Plate Length: 180mmLong Quick Release Plate Width: 38mmDouble-layer Clamp Length: 50mmDouble-layer Clamp Width: 50mmItem Weight: 333g / 11.7ozPackage Size: 23 * 12.2 * 6.5cm / 9.1 * 4.8 * 2.6inPackage Weight: 410g / 14.5ozPackage List:1 * BPL-180 Long Quick Release Plate Double-layer Clamp Kit