S603ZZ Stainless Steel Shielded Ball Bearing 3mm x 9mm x 5mm S603ZZ Stainless, shielded, radial and deep groove ball bearing,S603ZZ bearing is made of stainless Steel, S603ZZ bearing is closed with metal shields to protect the bearing from dust or any possible contamination,S603ZZ bearing is shielded and self lubricated, the quality is set to EMQ (electric motor quality), S603ZZ bearing is lubricated with grease.