Upgrade your RC boat drivetrain with this 4mm flexible shaft assembly kit, designed for brushless RC racing boats. The set includes a 350mm flexible shaft with a 75mm hardened shaft head, a 300mm brass tube sleeve, a 300mm Teflon liner, spacer washers, propeller dog drive, and bullet-style lock nut.

The shaft features M4 threaded ends (10mm length), supplied as a CW and CCW pair for different propeller rotation setups. The durable flexible shaft allows smooth power transfer, supports angular alignment, and reduces vibration, making it ideal for high-speed RC boats.