... . Materials: Product wetted--SS 304/316Gaskets: EPDMMechanical seal: SIC/SIC/EPDMInside surface treatment: Ra 32µinOutside surface treatment: Sandblasted or mirror surface ... options Mechanical seal: C/SIC, TC/TCGasket: FPM (Viton ... , flange, 3A, DIN, SMS, RJT, I Stainless steel sanitary vacuum water pump