- Huge red rubber bung to fit large demi-john fermenter mouth
- Straight sided #13.5 3″ wide with 1/8″ lip to prevent falling into carboy
- Drilled to fit standard 3/8″ airlock or blowoff tube
- Will fit many vintage glass Demijohns. If it doesn’t fit your demi, try using it upside-down.
- Please measure your demi-john mouth before ordering. This stopper fits a 3″ opening.
Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. (Rubber)
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