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Strong & Tamper-Proof Design: Made from durable 5560 micron polyethylene material with a high-strength self-adhesive seal. Once sealed, the bag cannot be opened without visible damage and Our Mailing bags incorporate a permanent self-seal closure and are made from an opaque 60 micron film. Our posting bags have a self-adhesive strong closure. These air sealed postage bags are water and dirt resistant and made to secure the inside and outside.
Strong Multiple Color Mail Postage b
