Product Description "Product Size: Diameter: 6 (152mm) Individual blades: 2""x1.5""(50mm x 38mm) Diameter center bore plate: 1.75"(44.4mm) Diameter center round bore hole: 0.12""(0.32mm) Package Included: 1 x RV Fan Blade, 1 x Motor, Decide your rotation: The direction of spin is determined by looking down through the motor, at the top of the blade. and the vent fan motor has reverse polarity, which allows turning in both clockwise or counterclockwise. you can determine the direction yourself if it rotates in the wrong direction, just reverse the wires on the motor. Long service life: The RV exhaust fan is made of environmentally friendly plastics, which is durable and corrosion resistant, And the RV celling fan motor has been fully tested, which is powerful and quiet, will not disturb your RV life Note: Please compare the size of the fan and motor kit with the old exhaust fan motor to ensure an accurate match. The old RV Fan Motor is prone to noise, and replacing it can reduce the noise.