Chapin Mfg. 6-4627 Sprayer Repair Kit by Chapin R E Mfg Works Seal and Gasket Kit Fits model no. 1739, 1749, 2209, 1831, 1941, 1449, 6300, 1949, 1979 Includes plunger cup, cup disc, washer, bottom valve (viton), two pump barrel gaskets Includes: o- ring, cover gasket, o-ring (viton), steel nut, two compression spring