What is the size of a 10mm spark plug? 10X what.. thanks leroy On Apr 5, 2012 9:51 AM, "Richard Strobel" <Richard_Strobel7 at msn.com> wrote: Where ya'll get your head gasket material? TIA, RickinMt. _______________________________________________ SEL mailing list SEL at lists.stationary-engine.com http://www.stationary-engine.com/mailman/listinfo/sel