100 Skateboard/Inline Skate Bearings works with Roller Hockey & Rollerblades Too 2 Removable Red Seals 100 Skateboard/Inline/Skate bearings work in Rollerblades and scooters, Deep Groove Radial Ball Bearings, bearings have 2 Removable Red Seals,608-2RS Bearings are made of Chrome Steel, each 608-2RS bearing has 2 Removable Red Seals to protect the bearing from dust or any possible contamination, 608-2RS bearings are pre-lubricated with oil.