Applicationt: 
Universal
Production Description:
1) Bore diameter from 3mm to 50mm
2) Gcr 15 (SAE52100)chrome steel
3)Hardness: HRC60-65
4)low noise and low vibration, long life, low price
5)Model available open, Z, ZZ, RZ, 2RZ, 2RS
6)ISO9001 certificate
7)Single color box or tube industrial packing
1)Bore diameter from 3mm to 50mm
2)bearing range: 60 , 62 , 63 , 68, 69 series and so on
3)Quality level is above ABEC1/Z2