10T Aluminum Pinion Gear(for 3.17mm shaft)
11T Aluminum Pinion Gear(for 3.17mm shaft)
12T Aluminum Pinion Gear(for 3.17mm shaft)
13T Aluminum Pinion Gear(for 3.5mm shaft)
12T Steel Pinion Gear(for 3. 5mm shaft)
13T Steel Pinion Gear(for 3. 5mm shaft)