Drilled Rubber Stopper

Tapered rubber stopper to effectively seal carboy mouth for beer fermentation. Made of food safe material, the stopper has a drilled hole at the center. This can be used to hold the air lock – another fermentation accessory that allows a one-way gas exchange. CO2 gas from yeast activity is released while not allowing any gas to enter the fermenter.
Works well with standard carboys and fermentation air-locks.

Specifications

• Made of FDA materials, BPA free
• Work with Plastic carboys : 54L
• 3/8″center hole to accommodate standard air locks.
• Keeps air from reaching the beer or wine
• Easy to clean and fits plastic better bottle carboys

Warnings / Instructions

Important information – Prop. 65 for CA residents.

Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.