1Pair RC Jet Boat Underwater Motor Thruster 7.4V 16800RPM CW CCW 3-Blades Propeller for DIY Mini ROV Robot RC Bait                Applicable: used for modification, remote control boat, nest ship, pull net boat, remote control submarine, miniature underwater robot.     The underwater thruster with unique design provides smooth operation and strong power.     The underwater thruster is high performance ensures better work efficiency.     With fine workmanship, it has compact structure , eco-friendly and durable for long term use.     It can be used for modification, remote control boat, nest ship, pull net boat, remote control submarine, miniature underwater robot.     Specifications:     Hull length: 50mm     Diameter: 31mm     Total length: 76mm     Propeller: 39mm     Operating Voltage: 3V-12V     Best state: 6V-9V     7.4V Maximum no-load speed:16800 RPM/min     Use: Vehicles & Remote Control Toys     RC Parts & Accs: Motors     Model Number: Underwater Thruster Motor     For Vehicle Type: Boats     Remote Control Peripherals/Devices: Motor     Tool Supplies: Assembled class     Upgrade Parts/Accessories: Underwater Thruster     Colour:Blue + white     Material:Metal + plastic     Package Contents:     1 * Clockwise propeller     1 * Counterclockwise propeller     2 * motor     2 * mounting     Only the above package content, other products are not included.     Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.