#6.5 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 it provides a solid fit on 1 gallon glass jugs.  The size is 38 mm.  Check our related items for additional sizes, both solid and drilled.  We also carry a two bubble airlock that fits the bung and one gallon glass jugs.