Bronson Speed Co. G3 Next Generation Bearings designed for today's skateboarding. Deep Groove Raceways -Balls roll deep in raceway channels -Reduces side impact damage & breakage Straight Edge, Removable Frictionless Shields -Pop off resistant -Hold oil in, dirt and moisture out -Easy to clean Micro Groove Raceway Surfaces -Linear micro-groove surfaces improve bearing lubrication, speed and spin Max Impact Cage Design -Non-distortion custom cage keeps the balls precision spaced -Micro grooves aid in oil circulation Balls Out Technology -Eliminates shield and cage contact on impact for a go fast, stay fast bearing High Speed Oil -Custom engineered light oil lubricant is water, oxidation and corrosion resistant for extended wear protection Factory Fresh Quality -nitrogen filled shrink wrap, reduces metal & oil oxidation until ready to be ridden Case=10 Box/8 Bearings, 4 Spacers, & 8 Axle Washers