Homebrewers OutpostAirlock Grommet (Pack of 5)

Exactly as expected. Fits the pre-drilled hole in the top of my 7 gallon primary fermenting bucket. The original grommet was worn out, but now my primary is good as new!

These fit my fermenting bucket perfectly and were minimally packed so I can store the rest for the next time I blow an O-ring.

Worked unexpectedly well, far better than I had hoped.

Quedó perfecto

Inside hole was too large to ensure airlock integrity. Useless.Probably best to shop at a brick-and-mortar store for items like this. Who knew?

Great things as I thought

Just what I expected.

I used these to convert mason jars to air locked fermentation vessels. I used a drill press to pierce holes in the jars, and the grommets fit perfectly. I'm now fermenting veggies for a fraction of the retail cost.