From blower wheels and fan blades to a complete line of individually packaged cast iron pulleys- our air handling selection is designed to complement your condensor, draft inducer, flue exhaust, small appliance or furnace repairs. In order to maintain a system that operates smoothyly, the parts inside have to work together in harmony. Having well-balanced blower wheels and fan blades help keep equipment stable.Replacement Blades For Refrigerators, Freezer Evaporators and Ventilators. Light Weight Design Reduces Bearing Wear & VibrationSlotted Set Screw Hub Sizes 3/16, 7/32 & 1/4 in.Rotation Is Determined By Facing Air DischargeDurable