NEW Spout Gaskets for old military-style 'Jerry' Gas Can MADE OF NITRILE Will not swell Made to replace gasket on spout Inside diameter: 2 5/16" Outside diameter 2 15/16" 1/8" thick These gaskets are meant for the spout itself, not for the can cap. We do also sell the can gaskets meant for the mouth of the can, but these gaskets are not designed for that.