Leeson DC Motor Control # 174307 - NEMA 1 - 90/180VDC, 1/8 hp to 2 hp Input Voltage 115/230 Volts AC 60hz 1/8HP to 1HP @ 115 volts 1/4HP to 2HP @ 230 Volts NEMA 1 Enclosure; Dimension 6" x 8" Heat sink # 174316 required for Leeson DC Speed Control for motors: 3/4hp & 1hp 115v; 1.5hp & 2hp 230v. Mounts to back of DC control. One Year Manufacture Warranty