MANUAL STARTER 277VAC,0.5 and 0.75 Inch Knockouts (top and bottom) Screw Clamp,1 hp 277 V AC-1 hp 115 V AC-1 hp 230 V AC,1 phase,1-Pole,16 A,277 V AC,Designed for the control of small single phase AC motors that have separate windings for high and low speed operation,Duplex Unit Manual Starter,Duplex Unit Metal Box - General Purpose,F,NEMA 1 plastic standard size,Thermal - Melting Alloy,UL Listed - CSA Certified - CE Marked