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Tyvek® Envelopes
 • The ultimate in tear, puncture and moisture protection • 10 times stronger than regular paper envelopes You can trust your important papers and documents with these durable mailers that come in an assortment of sizes. Choose from plain white or printed “First Class” styles. Flat Envelopes are constructed from tear-resistant, 14-lb. olefin. Expandable Envelopes are made from tough, tear-resistant, 18-lb. olefin. |
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