XRAY has released Ball-Bearing MR106ZZ 6x10x3 2 under Metal Bearings category
Top-notch ball-bearings ID x OD x level (mm) = 6x10x3mm. Couple of 2 pieces.
These ball-bearings are degreased and very carefully oiled with AeroShell Fluid 12 oil for maximum smoothness, longevity, most readily useful threshold and maximum performance.