Plastic Lock Holders/38mm threads, fits our 1 gal and 1/2 gal glass jugs
Screw on to the gallon jar for perfect sealing and never pops ups.
Replaces the bung for a 1 Gallon jug.
Cap with molded hole to accommodate our Three (3) Piece Fermentation Lock and will not work with double bubble airlocks.
Note: it doesn't fit our Glass Airlock.
VERY EASY TO CLEAN.
Maximum Temperature: 75 °C (167 °F).