Description: Brand new and high quality. Made from high quality brass material, and the coupler is steady, reliable and strictly functional. Used for connecting the motor shaft and the hexagon wheel of the machine, robot, toy cars, boat propeller shaft, etc. There is cushioning, vibration and improve the dynamic performance of the shaft. Great for RC model cars, robot and etc. Specification: Material: Brass Shape: Hexagon Shaft Diameter: 3mm, 4mm, 6mm, 7mm, 8mm Total Length: 18mm/0.71'' Diameter of hexagonal part: 12mm/0.47'' Screw hole diameter: M4 (4mm) Package Includes: 1 Piece Coupling 1 Piece Hex Wrench 2 Pieces Screws Note: As different computers display colors differently, the color of the actual item may vary slightly from the above images. There is 2-3% difference according to manual measurement. Please check the measurement chart carefully before you buy the item
