ONE 1 GALLON GLASS AIRLOCK CAP FOR BEER WINE FERMENTERS

This is a drilled caps to fit an airlock onto a standard one-gallon jug or cubitainer. The hole is approx 3/8" and when an airlock is inserted an airtight seal is created without the need for a grommet.They fit a 38mm jug mouth which is about an inch and a half outside to outside, and about an inch inside to inside. This means that they fit standard 1 gallon and 1/2 gallon jugs. They work with all standard 3/8" airlocks including the 3 piece, S-type, Mini, and Double Bubble.

I used acetone