#6 Rubber Stopper Airlock Hole
Add to your stock of homebrew supplies with this drilled rubber stopper. Made of solid rubber with a drilled hole that's perfectly sized for an airlock, this plug is perfect for keeping oxygen away from your fragile fermentation. Just pop this #6 drilled rubber stopper into the mouth of your carboy or fermenter, insert an airlock, and let nature do the work! *Please note: For best results, measure the diameter of the mouth of your carboy or fermenter and compare to rubber stopper measurements to find a good fit.*. In stock and ready to ship. Features: Made of rubber. Creates an airtight seal in the mouth of your carboy or fermenter. . Specs: Dimensions: 1 1/16" Bottom Diameter; 1 1/8" Top Diameter.