Roof Fan Motor Conversion Kit Compatible with Grainger Part Number 16D518 43Y140 5DVT3 6RJU4 6RJU5 6RJU6 6RJU7 6RJU8 6RJU9 Motor Horsepower 1/2 hp Maximum Motor Speed 1 725 RPM Minimum Motor Speed 300 RPM Nameplate Voltage 115V AC Phase 1 For Fan Type Upblast Fans Shaft Diameter 1/2 in Application Convert Exhaust Fan to Variable Speed Fan Current 6.7 A For Use With 6RJU7 Includes Potentiometer to Work as a Speed Controller That is Attached Directly to the Motor