XRAY has released Ball-Bearing MR128ZZ 8x12x3.5 2 under Metal Bearings category
Top-notch ball-bearings ID x OD x depth (mm) = 8x12x3.5mm. Group of 2 pieces.
These ball-bearings are degreased and gently oiled with AeroShell Fluid 12 oil for maximum smoothness, longevity, highest limitation and maximum performance.