Universal Plastic Carboy Breathable Bung | CellarScience®
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 don’t 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