8x22x7 mm (IDxODxT) Full Ceramic Bearing for lighter weight (bukan hybrid ! ) Hi-temperature, maintenance-free, lubrication-free and anti-corrosion Tanpa oli atau gemuk. Aman untuk mainan fidget spinner bagi anak anak ! Cocok utk gowes / mountain biking HIGH SPEED HIGH TEMPERATURE CORROSION RESISTANCE NON-MAGNETIC NON-CONDUCTIVE VACUUM CONDITION LUBRICATION amp; MAINTENANCE FREE