For use with wide mouth Ball or Mason style Jars.  Use jars and caps to store ingredients, odds and ends around your brewery and for general storage.

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Ball Wide-Mouth Plastic Storage Caps, 8-Count

Search: wide mouth mason jars at Amazon

Also available in Regular Mouth Size: Ball Regular Mouth Jar Storage Caps Set of 8

Related: FoodSaver T03-0023-01 Wide-Mouth Jar Sealer || FoodSaver T03-0006-01 Regular-Mouth Jar Sealer || FoodSaver V2244 [Review]