This is an original Team Losi A-3007 Top Shaft with Primary 22T Internal Pinion Gear for the LRM (Low Rotational Mass) transmission. This is in very good shape, it doesn't even look like it was ever really used. I bought this a long time ago with a Team Losi LRM Transmission that I ended up rebuilding and using for another car, with a slipper. So I never actually used this, but it was in a transmission I bought off eBay, so I assume it was used. This setup replaced the early brass gear that was used in the Jrx2 and JrxT. This was originally used in the Jrx Pro, and later the Junior 2 and Junior T. The slipper shaft was used in the LRM transmissions for the Jrx Pro SE and LXT.