Description: Made of metal and plastics, durable and wear resistant. Well adopt the sailing environment, good maneuverability. High Performance DIY Upgrade Parts. Easy to install and long-lasting use. It is suitable for the refitting of remote-controlled boats, which can propel the hull of about 7-8 KG. It is suitable for the refitting of various model ships and remote-controlled boats. Specification: Material: Metal+Plastic Size Chart: Size: Spray Water Thruster: 15x4cm/5.9x1.57inches 540 Brush Motor: 7.5x3.5cm/2.95x1.37inches Propeller: Diameter: 26mm/0.07inches Package Includes: Optional: A: 1 Piece 540 Motor Spray Water Thruster 1 Piece Motor Pad Accessories B: 1 Piece 540 Brushed Motor C: 1 Piece 2-blade Propeller 1 Piece 3-blade Propeller Note: Please allow 1-3 cm/ 0.39-1.18 inch difference due to manual measurement and 3-5 g/ 0.007-0.01lb/ 0.11-0.18oz for the difference between different colors. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!