Ceramic rear bearing, dimensions are 14mm x 25mm x 6mm
Fits Various engines using that size.

Includes the New Reedy 121 VR.

The bearings have double the RPM capability over steel and reduce friction,rotating mass and vibration. Material specs 52100 bearing steel, poly cage, Cerbec balls grade 3.

Used and recommended by EB Mods, RB Mods, RECAB.