What is this?This driveshaft and propeller assembly kit is designed for remote control boat enthusiasts and DIY enthusiasts. It is suitable for upgrading or repairing and modifying remote control model boats, remote control submarines, realistic boats, handcrafted wooden boat models, and professional boat models such as O-boats and V-boats.What will I get?Type: Drive Shaft with Propeller Universal JointMaterial: Stainless SteelBlade Outer Diameter: 1.42 inch/36mmUniversal Joint Connector Size: 0.12 inches/3mmPropeller Bushing Long: 7.87 x 0.35 inch/200 x 9mm(L x Dia)Shaft Size: 9.84 x 0.