High Speed. RC boat shaft with high speed ball bearing at the end of the shaft sleeve so as to driving efficiency smoothly. Durable. Drive shaft kit made of 304 Stainless steel material, high strength,not easy to rust. Axis precision thread.RC boat accessory is high precision thread, simple and easy to operate. Well Cut Slot. RC Boat motor shaft with well cut slots on the both ends of the shaft sleeve,easy to fix. High Concentricity.ship shaft transmission efficiency has high concentricity,suitable for all kinds of model boats,modified toy boats, handmade wooden boat models and professional boat models Size Chart: Shaft Length:Approx.10cm/3.94inch; Sleeve:Approx.5cm/1.97inch Shaft Length:Approx.15cm/5.91inch; Sleeve:Approx.10cm/3.94inch Shaft Length:Approx.20cm/7.87inch; Sleeve:Approx.15cm/5.91inch Package Includes: 1Set RC Boat Shaft Kit(1x Sleeve,1x Shaft Axis,1x Paddle Fork,1x Nut,1x 4mm Gasket,4x Bearing, 2x Paddles) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!