... 4.less friction and low noise Needle roller bearing NKI15/20:We are manufactuer and we are also agent for FAG ... etc. 1. Model: LZ series, HK SERIES, BK SERIES, HK-RS SERIES, BK-RS SERIES, FFH SERIES, MFH SERIES, FY SERIES, MFY SERIES, HF SERIES, HFL SERIES etc 2. Materials: GCr15 ...