16 Inline Skate Bearings works with Roller Hockey Too 2 Removable Rubber Seals Set of 16 Inline Skate bearings, they use in rollerblades, roller hockey and some quad roller skates, the set has 16 Deep Groove Sealed Ball Bearings, bearings have 2 Rubber Seals, Bearings are made of Chrome Steel, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with oil.