Turning Point Propellers Kit 715 Hub. This kit is compatible with Express Mach3 OS Series Propellers only for select Yamaha F350 15-spline shaft engines with a 4.75" gearcase. Turning Point is the only company to offer MasterGuard Installation kits and prop housings for 6-300+hp engines with a Lifetime Warranty Hub. Boaters save up to 38percent when buying a replacement propeller housing. MasterGuard hubs are Re-useable most of the time after a prop strike and if not they are Warrantied even if the prop is Destroyed. These hubs offer enhanced lower unit protection. Turning Point's MasterGuard Hubs are engineered to withstand typical wear and tear over time without risk of spinning or failure under normal operational use. Turning Point's unique patented one piece hub with glass filled nylon over durable marine bronze splines eliminates failures commonly seen in multi-part "sleeve and spline" designs and pressed-in rubber hub systems. Covered by US Patent #6471481 #6685432 #7717678 and worldwide patents with additional patents pending. Refer to manufacturer recommendations to ensure a proper fit before purchasing. Specifications for Turning Point Propellers Hub Kit 715: Manufacturer: Turning Point Propellers Color: Black Features of Turning Point Propellers Hub Kit 715 For Yamaha 350 Lifetime Warranty Never buy another hub kit system again Inner splines adapt to the engine Outer hub compatible with different props Reduce gear shock & engine/drive damage Save up to 30percent when purchasing a replacement prop Eliminate propeller vibration & chatter Eliminate hub cracking & failure Corrosion resistant materials - brass splines Reduce gear shock & engine/drive damage Package Contents: Turning Point Propellers Hub Kit 715 Turning Point Propellers 11701500: Kit 715 Hub