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Mailroom & Shipping > Envelopes & Mailers > TYVEK & Tear-Resistant Envelopes > Columbian Open End First Class Exp. Envelopes |
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![]() Columbian Open End First Class Exp. Envelopes |
First-class expansion envelope is super strong yet lightweight. Moisture-resistant and tear-resistant. 18 lb. Tyvek material. No-lick Grip-Seal closure makes it quick and convenient to use.
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