... :ISO9001:2000 & ISO14001 & TS169497.Feature:very low noise,high speed,long life8.Normal export packing,pcaking b cartn, then pallet will ... :1. Brand name: LR NSK SKF, etc.2. high precision, long life, low noise3. material: high chrome, carbon steel, stainless steel ... , steel retainer5. Sealing form: OPEN, Z,ZZ,RS, 2RS china fabric glass ball bearing