Rubber Stopper W/Hole (#8)

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 11/16" Bottom diameter: 1 7/16"

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

To start with, the built in tabs really help make bung removal effortless. But where the bung really shines is in its two-piece design. When set to the open position, the bung acts as an airlock and allows the release of CO2 while maintaining a seal again

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