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"Packing List Enclosed" (Panel Face-Script) Envelopes Pressure sensitive packing list envelopes secure and protect documents that are attached to the outside of shipments. Panel face, colored Packing List Envelopes are pre-printed with "Packing List Enclosed" in script font on heavy 2 Mil poly. Hot melt adhesive backing provides strong adhesion to paper and corrugated products. Envelopes open along the first dimension.