Feature: 1. Plastic and Alloy Materials: The thruster is made of plastic and alloy materials, which is durable, wear resistant, high in strength and more refined in appearance. 2. Firm Pump Structure: The pump structure is firm, which makes the hull more flexible and easier to operate. It can effectively push the ship by reducing the impact of natural water flow. 3. Reliable Performance: 40mm RC boat jet pump thruster is driven by cone, and fastened with anti slip nuts to ensure stable operation and convenient maintenance of the propeller. 4. Powerfully Propelling Ships: By reducing the impact of natural water flow, 40mm water jet thruster is very suitable for powerfully propelling ships. 5. Scope of Application: Equipped with 775 brush motor and heat sink, 40mm water jet thruster is applicable to the refitting of various model ships and remote control ships, and is widely applicable to ship hulls of about 80‑120cm. 6. Good Features: Smooth and neat surface, DIY good sailing environment, good performance, able to advance and retreat. Specification: Item Type: 40mm RC Boat Jet Pump Thruster Propeller Material: Plastic, Alloy Motor Material: Iron, Copper Weight: Approx. 636g / 22.4oz Thruster Assembly Length: Approx. 210mm / 8.3in Thruster Diameter: Approx. 40mm / 1.6in Thruster Aperture: Approx. 5mm / 0.2in Motor Model: 775 Working Voltage: 7.4-12V Maximum speed: 10000-16000RPM Length: Approx. 67mm (Excluding Shaft) Diameter: Approx. 42mm / 1.7in Shaft Length: Approx. 17mm / 0.7in Shaft Diameter: Approx. 5mm / 0.2in Propulsion: About 80-120cm / 31.5- 47.2in Hull Can Be Advanced Applicable Model: Suitable for Refitting Various Model Ships and Remote Control Ships. Package List: 1 Set x Thruster (8 Accessories in Total)1 x 775 Brush Motor1 x Rubber Tube22 x Screw1 x Nut1 x Wrench1 x Installation Diagram Note: 1. Please allow 1‑3mm error due to manual measurement. thank you!2. Due to the inconsistent calibration of the display, the colors of the items displayed in the photos may be slightly different from the actual objects.