This is a Pair of 4 x 8 x 3mm Ball Bearings from HPI.|
These bearings are used in many of the HPI RS4 nitro and electric
Rubber sealed and double shielded for long life.
Two 4 x 8 x 3mm bearings.
Inner Diameter: 4mm
Outer Diameter: 8mm
Removing bushings if so equipped, and replacing with bearings
COMMENTS To clean bearings, use Duratrax Powershot Motor and Bearing Cleaner