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If you guys have the Chinese copy of the 3m 701, it does work as it intended to be, but it won't thread into the TF-1 to make a seal. In a
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P3EV/2 adapter for attachment of 3M™ V4H, 3M™ V4D and 3M™ WP96 visors on 3M™ G2000, 3M™ G3000, 3M™ H-700 and 3M™ H-701 helmets without earmuffs
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3M 701 Black/Orange Filter Adapter - 70070408508 [PRICE is per BAG] : Amazon.ca: Tools & Home Improvement
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