#13.5 Drilled Rubber Bung

This is a drilled rubber bung.  It is made of sulfer free, pure gum rubber.  These rubber bungs are better than corks because they provide a solid fit on your carboy or Demijon.  The size is 2 7/16".  Check our related items for additional sizes, both solid and drilled.  We also carry a two bubble airlock that fits the bung.