Tape Planet Packing List Enclosed Envelopes 4-1/2" x 5-1/2" (1000 Per/Case)Pressure sensitive packing list envelopes secure and protect documents that are attached to the outside of shipments. Full face, colored Packing List Envelopes are pre-printed with "Packing List Enclosed" on heavy 2 Mil poly. Hot melt adhesive backing provides strong adhesion to paper and corrugated products. Envelopes open along the first dimension. 1000 per case.