1.Made of good quality brass material, Hex head.
2.The coupling is great for connect your motor of 4mm shaft to the wheel.
3.Can be used in electric car toy, robot, etc..
- Size: 12mm x 18mm(0.47″ x 0.71″)(W*L); Country of Manufacture: CHINA; Material: Brass
- Net Weight: 18g; Package Content: 1 x Coupling Joint, 4 x Screw
- Main Color: Gold Tone; Top Screw: M4
- Side Screw: M4; Shaft Diameter: 4mm(0.16″)
- Product Name: Coupling Joint; Length: 18mm(0.71″)