This is a 43 Tooth Nitro Spur Gear by HPI|
Black nylon construction, adapter type spur gear
One 43 Tooth Nitro Spur Gear
One Gear ratio chart and installation guide
HPI Nitro Two-speed transmission or heavy duty first gear adapter
This will only work on Two-speed transmissions that have the HPI
1st gear adapter type construction. The included gear ratio
chart list recommends gears for specific HPI vehicles.