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 & breakageStraight Edge, Removable Frictionless Shields-Pop off resistant-Hold oil in, dirt and moisture out-Easy to cleanMicro Groove Raceway Surfaces-Linear micro-groove surfaces improve bearing lubrication, speed and spinMax Impact Cage Design-Non-distortion custom cage keeps the balls precision spaced -Micro grooves aid in oil circulationBalls Out Technology-Eliminates shield and cage contact on impact for a go fast, stay fast bearingHigh Speed Oil-Custom engineered light oil lubricant is water, oxidation and corrosion resistant for extended wear protectionFactory Fresh Quality -nitrogen filled shrink wrap, reduces metal & oil oxidation until ready to be riddenset of 8 Bearings, 4 Spacers, & 8 Axle Washers