Item Type: RC Boat ThrusterMaterial: Plastic, Aluminum Alloy Color: GraySize:Product Size: 150x43mm/5.91x1.69inMouth Diameter: 26mm/1.02inMotor Aperture: 3.175mm/0.125inApplicable Model: Suitable for all kinds of model boats and RC boat conversion, can propel about 3-4kg hull. Suitable for 28/36 series brushless motor, or 540 series brush motor. 1Durable Material: This RC boat thruster is made of plastic and aluminum alloy material, which makes it resistant to wear and tear, strong and durable, and more refined in appearance. 2Good Performance: This RC boat thruster has a clean surface, a good sailing environment, good performance, and the ability to go forward and backward. 3Reliable Facilities: This RC boat thruster adopts 4mm steel drive shaft with shaft sleeve with two high speed bearings to make the shaft run smoothly and propeller drive. It adopts tooth wheel drive with anti slip nut fastening to ensure stable propeller work and easy maintenance. 4Sturdy Construction: The sturdy construction makes the boat more flexible and is ideal for powerfully propelling the boat by reducing the effects of natural currents. 5Application: This RC boat Thruster is more convenient to operate, suitable for all kinds of model boats and RC boat modifications, and can propel about 3?4kg of hull.