... ABEC1, ABEC3, ABEC5 3. Z3,Z4 Deep Groove Ball Bearing:1.Chrome steel material Gcr152.Open, ZZ, 2RS3. High ... Can provide small & miniature standard and non-standard ball bearings.8.Supply ability: 2,000,000 per month ... R156, R166, R168, R188 Other non standard deep groove ball bearings, with inner size over 10mmSealZZ, Z, 2RS, ... Machine, Vacuum Cleaner, Office equipment. Deep Groove chrome Ball Bearing