... ISO 9001 3. OEM service is available 4. Strict quality contral 5. Deliver in time Bearing’s Functions: aTapered ... bearing, etc.3 retainer: cooper, nylon, bakelite, stainless.4 quality:ISO90005 delivery: great stock and ready goods6 Bore diameter: 1mm ... Material: GCr15, SiMn etc8 feature: low noise, long life ,high precision,9 apply: machine tools, electrical ,railways,automotive,construction machinery ...