Industrial-duty clutch mated to high-performance Cat Pump increases durability and dependability. Convenient remote control of on-off function optimizes system performance. Superior strength forged rotor, hub and armature offer superior flux and maximum torque for long life. Single groove 7 pulley, A type belt and 16.5mm shaft. Fits Cat Pumps models 3CP1120, 3CP1130 and 3CP1140 plunger pumps.