- The cap size is 38mm which will fit most growlers. They can also be used for other 38/400 containers requiring a tight seal, which include many 1/2 gallon and 1 gallon jugs.
- Tough Plastic: These black caps are made of low-density polyethylene to provide excellent torque retention. Does not rust!
- Strong Seal: Conical shape draws tight and provides an excellent seal against the container.
- Easy Grip: Raised ridges span the entire circumference making the caps easier to grip.
- Quality Manufacturing: These caps are proudly made in the United States of America.
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