Montana Mask System - ScaleMod
grabcad
Provided are 100%, 93%, and 85% scale variants of the Montana Mask, with modifications such that they all take the same 100% filter frame insert. This eliminates the need to maintain matched-sets of frames and masks when the entire model is scaled. It also maintains proper spacing between the filter frame and the mask which would be altered in a global-scaling operation. (The filter element material doesn't scale.)Original Montana Mask site - https://www.makethemasks.com/
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