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• QRP Beige Food Grade Silicone Rubber Stoppers
• 000 Stopper (13mm top, 9mm bottom, 25mm length) inserts into 3/8" Grommet hole
• 3/8" inside diameter Grommet [...]

• BPA-free USDA Food Grade Compliant
• Grommet center hole is 3/8" and is the standard size for standard Fermentation Airlocks.
• White Silicone Grommets have a [...]

EACH COMPLETE FERMENTATION KIT FOR STANDARD MASON JAR INCLUDES

• Robust White Plastic Cap
• White Silicone Grommet installed in Cap to side to leave a space [...]