Round Gasket O-ring, Teflon encapsulated Viton rubber gasket. Fits FSPN252 FULL STEAM JACKETED FILTER HOUSING DUPO-125, 252-VT-FSP-FSJ, 252-VT-FSJ. Ultra Chemical Resistant FEP-Encapsulated Viton Rubber O-Ring. EGR30055VT EGR-30055-VT EGR-30055VT EGR30055-VT