Universal Rubber Stopper #6 - #7 - Drilled with Airlock Hole
$1978
Universal Rubber Stopper #6 - #7 - Drilled with Airlock Hole
Universal Rubber Stopper #6 - #7 - Drilled with Airlock Hole
In stock
$1978
30-day returns · Easy with prepaid labels provided
Get it by 3–5 business days
Free shipping · Change ZIP
As soon as tomorrow. Choose Next Day during checkout.
- Size: Universal #6 to #7 Taper (approx. 26mm - 37mm).
- Type: Drilled (with 3/8" Hole for Airlock).
- Material: Food-Grade Durable Rubber.
- Application: Sealing 1-Gallon Jugs and Erlenmeyer Flasks.
?
Need a hand?
Bilingual support from real techs · Mon–Fri 8:30–5 CT
Request a quote
Need a custom build, freight order, or just want pricing in writing before you order? Quotes back within 24 hours.
The #6 - #7 Universal Rubber Stopper is a versatile closure designed to fit a variety of small-mouth carboys, jugs, and flasks. Made from high-quality, food-grade rubber, it provides a 100% airtight and liquid-tight seal. This model features a pre-drilled center hole, specifically sized to accommodate standard twin-bubble or 3-piece airlocks. Its unique dual-taper design ensures a snug fit for both #6 and #7 neck sizes, protecting your beverage from oxygen and contaminants during active fermentation.
Brewery Tip: To ensures a perfect seal, always ensure both the stopper and the vessel neck are dry before insertion. If the stopper keeps "slipping out," a tiny amount of sanitizer can act as a lubricant, but drying is preferred for long-term aging. Sanitize with Star San or IO-Star before every use. This size is typically used for 1-gallon glass jugs and small laboratory flasks.