Stainless Steel Disc (CF8-SS304) Stainless Steel Shaft Stem (SS410) Cast Iron Body Constrctn (ASTM A126 Class B) EPDM Rubber Lining # 150 PSI test For installation above or below ground Perfect water shut off in both directions No Flange Gaskets required Self Centering Disc Anti Blow Out Stem Epoxy-Coated Body Greases Zirk for shaft lubrification