Superior quality aluminum alloy is used to ensure a light weight but super high strength support. Advanced CNC (Computerized Numeric Control) machine systems provide precise dimension to fit perfectly. Aluminum Anodized surface treatment assures years of corrosion and abrasion-resistant operaton. Anti-twist locking screws match the international standards Special anti-slip rubber pads enhance the grip between each plate and the mounted gear, and protect the gear from any damage due to mounting. Material: Metal Color: Black Length: 50mm Width: 38mm (universal width of Arca Standard QR plates) Thickness: 10mm (universal thickness of Arca Standard QR plates) Mounting Screw Diameter: 1/4inch (the screw size that connecting the QR plate and camera) Compatibility: Arca Standard Package Contents: 1 x Quick Release PlateNote: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.