High-speed ball-bearings produced particularly for XRAY with low radial play. ID x OD x level (mm) = 6x10x3. Range 2 pieces. Top-quality expert ball-bearings for a super-free, super-smooth drivetrain. These highest quality ball-bearings are fitted with unique plastic covers, and are usually usually furthermore degreased and very carefully oiled with AeroShell Fluid 12 oil for maximum smoothness, longevity, best limitation and maximum performance. These ball-bearings do have more (and bigger) balls within the cage compared to the regular ball-bearings, making them a lot more resilient under lots. The within covers are now actually a facile task to eradicate for fast and comfortable servicing. These ultra-high accuracy ball bearings are manufactured to withstand all extremes on program under battle conditions and/or merely enjoyable rushing.