... , HK RS, HK 2RS, BK RS, F, FH, MF, MFH, FY, MFY, HF, HFLWe are professional manufactuer .1. Model: LZ series ... , HK-RS SERIES, BK-RS SERIES, FFH SERIES, MFH SERIES, FY SERIES, MFY SERIES, HF SERIES, HFL SERIES etc 2. Materials ... : 2000 ISO 14000/14001, OEM available Original needle bearing (NK24/20)