the prop is for Haibo motor of 3" O.D.(30lb-34lb) ,It is specially designed for improving the work efficiency,part no.is HP6.393.000.00.Looking for ideal prop with three blades Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the propeller with three blades are quality guaranteed. We are China Origin Factory of three blades propeller. If you have any question, please feel free to contact us.