Feature:1. Made of premium cast iron material and through excellent forging technology, very durable for long use.2. This crankshaft ensures convenient control over the air compressor as well as high accuracy and efficiency.3. Enables better control on the needle valve, and the operation is also very simple, which will save the time.4. Can be ued on various brands of air compressors and other equipment, including for Bama, for Fengli, etc.5. Comes with a small size and a light weight, you can easily install the crankshaft connecting rotor with screw.Specification:Item Type: CrankshaftMaterial: Cast IronFunction: Air compressor and air pump accessory. Shaft Hole Size: Approx. 20 x 22mm / 0.8 x 0.9in Package List:1 x Crankshaft