bearing housing stainless steel and cast iron available ISO9001:2000 certified company third party inspection stainless steel, cast iron and PTB bearing housingStainless steel Insert bearings like UC, SB, series etc.PBT housings like T, P, PA, TB, ect. Stainless steel and cast iron housing like P/F/FL/PA/FC/T//PFL/PF/PFT etc