[Coupling Size] - Cylinder Length Size: 18mm / 0.71"; Opposite Side: 12mm/0.48"; Cylinder Outer Diameter: 11mm/0.43"; Cylinder Inner Diameter: 4mm/0.16"; Base and Side Screw Hole: M4
[Type] - 4mm Hex Brass Shaft Coupling, suitable for connecting motor shaft and wheels with diameter of 4mm (0.16 inch), perfect accessories for RC Model motor, etc
[Material] - Motor flexible coupling connector is made of high quality brass, rust and corrosion resistance, sturdy and durable, reliable and strictly functional. Good insulation, make your shaft more stable, easy to install and replace
[Application] - A special high-precision coupler, easy to install and replace, widely used to connect motor shaft and wheels, often used in DC motor, robot, toy car, car model and car tire, etc
[Package Content] - 2pcs x Hex Coupler, 1pcs x 4mm Hex Wrench ( With M4 Screws )
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