6003RS Sealed Ball Bearings 17mm x 35mm x 10mm 6003RS Sealed Ball Bearings, 6003RS Bearings are made of Chrome Steel, each 6003RS bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, 6003RS bearings are pre-lubricated with grease, Bearings 6003RS are packed 10 bearings in one plastic tube.