The Leeson Boat Lift Motor has a totally enclosed, non-vented housing (TENV) to prevent dirt and insects from entering. This housing improves the life of the motor. NEMA, UL listed and CSA approved, they are Standard Duty, Single Phase Capacitor Start, 56 frame motors compatible with most flat-plate, belt-driven hoists. They can be wired for 115 or 230 volts. (2-inch pulley sold separately).