Universal Plastic Carboy Breathable Bung

This CellarScience Bung has a ridge to keep it from getting sucked in and self-sealing vent holes to let air out but not in. They have a gentle taper, so they dont slip out during use.  They are also very easy to clean and sanitize. This a perfect fit for a 1.5 TC ferrules, Fermonsters, and Vintage Shop Plastic carboys.

• Replaces Stopper Sizes #8, #9, #10
• Stopper Measurements: 1.36" x 1.89" (34.5 mm x 48 mm)
• The flapper stopper protrudes roughly 2.5" from the stopper to allow for easy assembly