All stainless steel construction. The 9"Ø X 12" wide rotor has eight vanes and turns at approximately 20RPM fixed speed. Adjustable wier plate for material flow control. Installed 8 cubic foot hopper with 1 1/2" side ports for level indicators. 3:1 Chain drive with guard. The 1/2HP gearmotor requires 230/460 volts, 60Hz, 3 phase AC power. Demonstration video available.