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Seal your fermentation vessels reliably with our Small Universal Drilled Bung. Engineered with a multi-tiered, tapered profile, this versatile stopper is crafted to fit a wide range of vessel openings, including standard 1-gallon glass jugs, 0.5-gallon growlers, and smaller carboy necks. It features a precision center-drilled hole designed to securely hold standard 3-piece or twin-bubble airlocks, creating an airtight barrier that protects your craft beer, wine, cider, or mead against oxidation and airborne contaminants.
Universal Stepped Design: Flexible, tapered flange construction accommodates slight variations in bottle neck openings for a snug, airtight fit.
Pre-Drilled Airlock Port: Features a standard 3/8-inch center hole sized precisely to receive 3-piece and S-bubble plastic airlocks without slipping.
Non-Absorbent Silicone Construction: Crafted from high-grade silicone that will not crack, dry out, absorb persistent brew odors, or harbor wild bacteria.
Temperature & Chemical Resistance: Resists high heat and repeated exposure to chemical sanitizers like Star San and iodophor without degrading.
Reliable Blow-Off Grip: Grips wet glass surfaces better than standard rubber bungs, significantly reducing the risk of slipping out under active fermentation pressure.
Capacity / Volume: Fits standard 38 mm openings (1 Gallon jugs, 0.5 Gallon growlers, and select 3–5 gallon carboys)
Pack Quantity: Single (1 bung) or Case (600 bungs)
Color / Finish: Translucent White
Material: Food-Grade Silicone
Neck Finish / Closure Size: 3/8" Pre-Drilled Center Hole (Standard Airlock Size); fits ~1-1/8" to 1-1/4" neck IDs
Safety & Compliance: BPA-Free, Food-Grade Safe, Odor-Free
Care Instructions: Dishwasher, boil, and sanitizer safe
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