Features
This rubber grommet fits a 1/2" hole leaving you with a 3/8" ID, perfect for an air lock.
More options
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Brush - Bottle Filler$ 7
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Gypsum 1 lb$ 5
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Verdant IPA Yeast 11g$ 8.9
610 -
Calcium Carbonate 1.75 oz$ 2
332 -
Calcium Chloride 2oz$ 2.75
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