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YOTU KN95 Face Masks manufactured in China by Dongguan Sengtor Plastic Products Co., Ltd.
Check out the results here: www.armbrustus...
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Lloyd Armbrust
13501 Immanuel Rd
Pflugerville, TX 78660
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Testing Methodology: In these videos we test mask breathability and filtration on our Particulate Filtration Efficiency Machine (PFE).
Find out more:
•The Four Things to Look for in a Mask: • 4 Things to Look For i...
•How Does a PFE Machine Work: • How Does A Particulate...