All features:
- dual ball bearings
- some include prop adapter
- sturdy metal construction
- some include multiple pinions
- motor sold separately
| Part No. | Gear Ratio | Pinion | Size inch | Wt oz | Shaft Dia | Applications |
| ACC4036 | 3.3 | 2.3mm, press fit | 1.14 dia x 1.07 | 1.5 | 5mm | Speed 400, 480 only, NOT for brushless motors |