Growler Cap 38-400 Black Phenolic - Glass and
2018-10-7 · growler caps 38mm polyseal 38/400 finish phenolic cone seal closure for glass 1/2 gallon amber growlers and 1 gallon jugs taperseal 9.95 Tough Plastic: These black caps are made of Phenolic low-density polyethylene, similar to Bakelite to provide excellent torque retention.
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