Rubber Stopper W/Hole (#8.5)

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: 1 5/8" Bottom diameter: 1 3/8"

Pure white gum laboratory stopper - with 3/8" drilled center hole. Top diameter: 1 13/16" Bottom diameter: 1 1/2"

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

Pure white gum laboratory stopper - with 3/8" drilled center hole. Top diameter: 1 1/2" Bottom diameter: 1 1/4"