Replace a lost or broken product with this Maxpower 334221 1-1/2" Vented Gas Cap. This replacement part is designed to fit on some Briggs and Stratton engines. The carded cap is made from thick molded plastic and designed to create a reliable seal on your engine fuel tank. Add it as a replacement for a lost or broken part or simply as an upgrade to an aging OEM product. This engine gas cap is simple to install and functions just as the OEM product it's replacing.