Made from our World Champion Ceramic Nitride Pro Series Bearing Material. 5x11mm CERAMIC BALL BEARING size MR115. This 5x11x4mm bearing is intended for high speed use.
For 5x11mm clutch bearings use part C053
For 5x11x4mm ceramic ball bearing for brushless motors use part C069
This is the equivalent of a Tamiya size 1150 ball bearing