Universal Stopper #11-11.5 W/Hole (Fits 54L Demijohn)

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

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

Pure white gum laboratory stopper - with 3/8" drilled center hole. Top diameter: 2 11/16" Bottom diameter: 2 5/16"

Pure white gum laboratory stopper - with 3/8" drilled center hole. Top diameter: 2 9/16" Bottom diameter: 2 1/8"

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.