1.Series:HI series,NTN series,etc. 2.ISO 9001:2008 3.Mold:OPEN,Z,ZZ,RZ,2RZ,RS,2RS 4.OEM Supplier Specifications: 1.Series:HI series,NTN series,etc. 2.Tolerance:ABEC-1 ABEC-3 ABEC-5 3.ISO 9001:2008 4.Bore size:10 to 100 mm;Outside diameter:20 to 200 mm 5.Sealing:OPEN,Z,ZZ,RZ,2RZ,RS,2RS6.Noise Level:EMQ V1 Z2,EMQ V2 Z3,EMQ V3 Z4,EMQ V47.Low vibration, Low noise, High precision and durable8. ...