Feature:
Material: Brass
Color:Golden Tone
Side length: 7mm
Diagonal: 13.6mm
On the edge: 12
Height: 18mm
Cylindrical outer diameter: 11.5mm
Side thread: M4
Bottom thread: M4
Applicable motor shaft: 3mm
Scope: hexagonal coupling is used to connect the motor shaft and the hexagonal wheels.
Dimension:18 x 11.5mm/0.71 x 0.45"(L x Dia)