Item name: 3.175mm to 5mm pinion gear adapter.
Material: Steel
Inner Diameter: 3.17mm
Out Diameter: 5mm
Length: 12mm
Color: Silver
Made of high-quality steel, more durable. High precision machining, stable and reliable.
Can convert pinion apertures from 5mm to 3.175mm.
Compatible with all 5mm bore gears and 3.175 shaft diameter motors.
Suitable for RC motor 3650 550 540 brushed / brushless pinion gears etc series motors.

Package List:
5 * 3.175mm to 5mm shaft adapter
1 * L allen key
10 * Grub screws