S6700ZZ Stainless Steel ABEC-5 Ball Bearing With Ceramic Balls 10mm x 15mm x 4mm One Bearing S6700ZZ Hybrid Ceramic Stainless Steel Ball Bearing and ceramic balls ABEC-5 quality, S6700ZZ is a popular size that could be used in many applications that uses this size 10mm x 15mm x 4mm. S6700ZZ Bearing is made of Stainless Steel, S6700ZZ bearing has 2 metal shields to protect the bearing from dust or any possible contamination, S6700ZZ bearing is pre-lubricated with grease.