S695ZZ Stainless Steel ABEC-3 Ball Bearings 5mm x 13mm x 4mm Lot of 10 Bearings S695ZZ Stainless Steel ABEC-3 Ball Bearings, Bearings are made of Stainless Steel, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.