Flip HKD ABEC 7 ball bearings have been specifically designed for skateboarding and are sold by pack of 8 bearings.
ABEC 7 performance
New micron-coating lowers co-efficient of friction
Grade 10 hardened balls, (truer roundness, better steel) higher rockwell
Plastic ball retainer additive to reduce friction
High micron finish - smooth surface = better performance
Factory is 9001 certified = consistent high quality
Set of 8(eight) bearings.