Medium Universal Stopper - Drilled
Plastic bung with a drilled hole for airlocks. This universal style has a longer taper than rubber stoppers, for a snug fit and better seal. Fits plastic carboys, Better Bottles and Bubbler PET fermentors. This bung is too large for the Big Mouth Bubbler® universal lid.
Top Diameter: 2.375"
Bottom Diameter: 1.656"