The Kupo KCP-700-PRM CNC made anodized aluminum plate is designed for the Convi Clamp with two M5 sets screws. This allows for the Arri PSU Rail Mount Adapter to be easily attached, and provides a mounting solution for supporting the power supply unit on any tube from 5-51mm (especially on a roller stand) or flat surfaces with the Convi Clamp. (Size: 50 x 29.5 x 16mm).