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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38mm Screw Cap with hole$ 0.95
897 -
Carboy Cap 2 spout$ 2.99
982 -
Bench Capper$ 44
994 -
Carboy Handle$ 7.99
621
