We are manufactuer and we are also agent for FAG, KOYO, NTN, SKF, THK, TIMKEN, ZWZ and 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, GCr15SiMn, G20Cr2Ni4A etc Ring and cages: Chrome bearing steel Balls: Chrome steel or carbon structural steel Cover: Rubber or metal