Thin Section Bearings: 2.ISO9001;2000 3.various types 4.low price,high precision, excellent quality.quick delivery Types: Deep Groove Ball Bearing Angular Contact Ball Bearing Thrust Angular Contact Ball Bearing Cylindrical Roller Bearing High Speed Precision Bearing Cross Roller Bearing ...........1. Material: Chrome Steel GCr15 / Gcr15 Simn Stainless Steel AISI152100/AISI1440C....2. Service: ...