6x12x4 Metal Shield Bearings
The Halo series of bearings are a high quality steel/chrome bearing with metal shields. These bearings have been tested and proven by many racers.
6x12x4 Halo bearing by Avid Racing Concepts is a popular bearing for vehicles/makes like the T-Maxx, E-Maxx, Tamiya's, and others. Is also used on the axles of popular nitro touring cars like the Kyosho V-One RRR.