Description: Material:Made by Aluminum, strong and light weight. Surface: corrosion resistance, stand wear and tear,and surface smooth. Compatibility: This PU-50 quick release plate fit for not only Benro B/ J-series Ballhead, but also other Arca Swiss compatible quick release systems. Camera screw: Stainless steel camera screws, increasing hardness and fastening strength of the Quick Release Plate. You can change the location of the screw to fit different cameras. Specification: Material: aluminum alloy Size: 48 * 36 * 10mm Application: Compatible with many international camera clamping base(Such as Benpro, ACRA, KIRK, WIMBERLEY, RRS, Happy Way, etc.) Package Includes: 1x Quick Release Plate