S623ZZ Sealed Ball Bearing 3mm x 10mm x 4mm S623ZZ Bearing, categorized as regular section, metal shielded, radial, deep groove ball bearing,S623ZZ bearing is made of stainless Steel with stainless Steel balls and steel cage,S623ZZ bearing is closed with metal shields to protect the bearing from dust or any possible contamination,S623ZZ bearing is shielded and self lubricated,the quality is set to EMQ,S623ZZ bearing is lubricated with grease.