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An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
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We've modified the popular Montana Mask to include a splash guard and threading to accept Halyard H600 as filter material. These files are designed for additive manufacturing and print without support. The threading ensure a seal for the filter material while reducing the tolerance by the machines for the original press fit design.
