... Aluminum case or Cast Iron case Unit bearing MotorVoltage:110-120V or 220-240VFrequency:50/ ... 60Hz, Power:2W, 4W, 6W, 9WSpeed:1350/1550rpmFeatures: 1) Cast iron or aluminum construction 2) Output: 2W, 4W, ... , continuous and air over 7) Overload protection 8) Proven unit bearing design 9) UL and CUL listed Replaces: GE, ... machines, display cases and other fan duty applications. Unit bearing motor 02-5