Universal Plastic Carboy Breathable Bung Type_Malt They feature a "nuke-shaped" internal

They feature a "nuke-shaped" internal shuttle that is made from TPV

this allows for gas exchange while preventing wild yeast and fruit flies from entering

Cage: 2"h x 1 1/2"d

and firmly connect a bag to the spider

Optimal ambient temperature is  65°F – 80°F

Universal Plastic Carboy Breathable Bung Type_Malt They feature a "nuke-shaped" internalThis 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.