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    Founded in 2014, Masontops creates products that engage. Originating with the Mason jar as our muse, Masontops has taken the fundamantal qualities of the Mason jar—durability, simplicity and versatility—and applied them to every facet of our business. 

    Fermentation Tools for Regular Mouth Mason Jars

    Regular mouth Mason jar lids have a diameter of 2.75 in or 7 cm. Measure across the mouth of the Mason jar, edge to edge.

    Regular mouth Mason jars have a smaller diameter than wide mouth Mason jars. 

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