15 mm Pro rail support type P, specifically designed for compact to medium cameras with both a central 1/4” and 3/8” thread hole. This light weight and compact rail support has an adjustable rail height, for all cameras where the lens mount is 48 mm to 66 mm above the camera base. For VCT-14 quick release plate use the optional V-lock adapter plate (0350-2041).For shoulder pad use the optional 0370-0010