Drilled gum rubber stopper. Used to provide a positive seal; works well with standard beer bottles. Drilled hole is compatible with standard airlocks.
Top Diameter: 0.787"
Bottom Diameter: 0.63"
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Best Fit Beer bottle opening Bottom Diam. 5/8"
5.0 / 5.01 ReviewVery Good ItemVery good item, excellent quality and will order again when needed. Midwest Supplies are my main source of wine making supplies.August 16, 2018Purchased
8 months ago
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