RC Boat 4mm Stainless Steel Drive Shaft with Three Blades Propeller, Universal Joint, and Shaft Sleeve This listing includes multiple options. Please select the desired configuration. All sizes are in stock. Package Includes: 1 x Shaft Kit with Propeller Blades and Universal Joint Shaft Diameter: 4mm Sleeve Diameter: 10mm Shaft Length (L): 10/15/20/25/30/35 cm Shaft Sleeve Length (H): 5cm shorter than shaft length Bearings: Equipped with two high-quality high-speed bearings Propeller: Default 3-blade 36mm CW propeller (For orders of 2 pieces, one CW and one CCW will be included) Waterproof silicone ring included Specifications: Product: 4mm Stainless Steel Marine Propeller Shaft with Shaft Sleeve Tube Set Material: Stainless Steel Shaft Diameter: 4mm Sleeve Diameter: 10mm Shaft Length (L): 10/15/20/25/30/35 cm Shaft Sleeve Length (H): 5cm shorter than shaft length Bearings: Two high-quality high-speed bearings installed Propeller: Default 36mm 3-blade CW propeller Features: - Designed and manufactured in our own workshop - New design using stainless steel with high-precision manufacturing - High concentricity between shaft and sleeve tube - Waterproof treatment applied on both sides of the sleeve tube - Improved concentricity and precision for reliable performance Option Description Example: L25-H20-Motor 3.17 L25 = Shaft length 25cm H20 = Shaft sleeve length 20cm Compatible with 3.17mm motor shaft