16 608-2RS Skate Bearings NYLON Retainer & Sealed 16 Skate Bearings 608-2RS with high speed, they work in the inline skates, the rollerblades and the roller hockey blades, every bearing have 2 seals to ensure the best closures and will not affect speed like seals, Bearings have Nylon retainer with a non-contact seal, each bearing has 2 non-contact seal to protect the bearing from dust or any possible contamination, these are self lubricated bearings.