Fermentation Rubber Stoppers Drilled Bungs For Use With Airlock (#6.5 Rubber Stopper - 4 Pack)

Have bought these twice. Good quality, have zero complaints about these. Had to do measurements to make sure I bought the right size. Airlock fits tight and secure tightly in the carboy. Have noticed if the inside rim or the rubber is wet they tend to slip out of the carboy. Can be solved with making sure those are dry or taking a rubber band and wrapping around the finger loop and over top of the stopper.They are a little pricey in my opinion but should last a lifetime.

Fast delivery. Great quality product.

these fit my big carboys and the hole is perfect for my tubing i use for the bubblers

I bought a couple of these for wine making one gallon jug Stoppers and for bigger jobs probably works fine just like it says no problems

I needed to center a shaft inside a tube in order to pour a polymer sleve on it. These were easy to drill to the right size and worked perfectly.

Using it for fermentation in a fermenter

Help me find the perfect size for my jugs.

These plugs have many good uses. Nice that there is a pack of varied sizes available.