Ball Bearings 5/32 x 5/16 x 1/8 With Ceramic balls Lot of 10 Bearings 10 Hybrid Ceramic Ball Bearings, this is a popular size that could be used in many application that uses this size 5/32 x 5/16 x 1/8. Bearings are made of Chrome Steel With Ceramic balls, each bearing has 2 Rubber Seal to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.