100 Skateboard/Inline Skate Bearings Ball Bearings with Ceramic Balls The Seal Color Could Change Wholesale Lot of 100 Skateboard/Inline/Skate bearings, The seal color could change, They work in roller hockey skates, rollerblades and even scooters, Ball bearings with high speed solid Ceramic Balls, Every bearing has a high speed steel ball retainer, with 7 Ceramic balls, And a non-contact rubber seal, Inner and outer races are made of chrome steel, Each bearing has 2 non-contact rubber seal to protect the bearing from dirt, Dust or any possible contamination, bearings are self lubricated bearings (bearings are already greased), low viscosity grease was used to ensure fastest possible speeds.