bearing 1.High precision,long life,low noise 2. ... -end technology auto ball bearingFeatures:High quality and good service Less frication and good service Competitive price Durable Ability to ... , 7000B, DB, DF, ETC. ISO 9001-2000 certificated Material: bearing steel, carbon steel, stainless steel. Etc. Precision: P0 P5 P6 ... 68series, 160series etc. for more information, please contact us ball bearing