1、P200 quick release base mount is in common use with for Manfrotto 501, 500AH, 701HDV, 503HDV, Q5 and other 577 standard of holders. 2、The function of quick mount seat is: Uniform the quick mount plates (Install the quick mount on the tripod, stabilizer, slide rail and other equipment, convenient for camera to switch among different equipments quickly). 3、Can be used with tripod, slide rail, stabilizer and different devices, which are all for photography. 4、Achieve fast switching among different devices without replacing the quick-release assembly. 5、Made of aluminium alloy, composed of a quick release clamp adapter and a quick release plate. Features: P200 quick release base mount is in common use with for Manfrotto 501, 500AH, 701HDV, 503HDV, Q5 and other 577 standard of holders. The function of quick mount seat is: Uniform the quick mount plates (Install the quick mount on the tripod, stabilizer, slide rail and other equipment, convenient for camera to switch among different equipments quickly). Can be used with tripod, slide rail, stabilizer and different devices, which are all for photography. Achieve fast switching among different devices without replacing the quick-release assembly. Made of aluminium alloy, composed of a quick release clamp adapter and a quick release plate. Specifications: Condition: Brand New Material: Aluminium Alloy Color: Black Compatible for Manfrotto 500AH, 701HDV, 577, etc. Size: Approx. 118 * 100 * 20 mm / 4.64 * 3.93 * 0.78 in Weight: Approx. 268 g Package List: 1 * Clamp Base Plate