Bronson Speed Co. David Gravette Pro G3 skateboard bearings. Deep Groove Raceways- balls roll deep in raceway channels – reduces side impact damage and breakage. Straight Edge Frictionless Shields- pop off resistant – holds 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 and oil circulating. Balls Out Technology- eliminates shield and cage contact on impact for a go fast, stay fast bearing. High Speed Ceramic Oil- nano-ceramic compounds for wear protection – moisture, rust, corrosion resistant. Factory Fresh Quality- nitrogen filled shrink wrap, reduces metal and oil oxidation until ready to be ridden.