Universal Medium Bung W/Hole (Fits Fermonster)

Plastic 3-piece airlock.  Fits standard grommeted lids, carboy bungs, and rubber stoppers.  Easy to take apart and clean.

Twin bubble airlock.  Fits all standard rubber stoppers and bungs.

Brilliantly clear, the 4" wide mouth opening and rib- less side make mixing and cleaning a breeze. **Requires a #10 stopper or medium bung**

Brilliantly clear with built-in 5-Gallon and 6-Gallon markers on the side for your convenience.

Brilliantly clear with built-in 5-Gallon and 6-Gallon markers on the side for your convenience.

White, rubber bung with longer taper for snugger fit and better seal. Lip prevents bung from falling into carboy. Fits Fermonster wide mouth carboys and other plastic carboys. Same size a #10 solid rubber stopper. Does not have hole for airlock.