10 Pieces D10-HD Diaphragm Gasket compatible with models MS 290, MS 310, MS 390, MS 440, MS 460, BR 320, BR 400, BR 420, SR360, FS 360, FS 500, FS 550, 133, 371XP, 365, 372.This diaphragm gasket set is designed for use in fuel pump and metering pump assemblies.Each piece is made to fit standard specifications for in outdoor power engines.The kit includes ten identical gaskets to support multiple repairs or replacements. Important: This product is an aftermarket alternative.Brand names mentioned serve only to show which devices it fits.