7" x 10" Orange "packing list/invoice enclosed" envelopes. Pressure sensitive packing list envelopes secure and protect documents that are attached to the outside of shipments. Use these 2 mil poly envelopes to attach packing lists and/or invoices to the outside of packages. Hot melt adhesive backing provides strong adhesion to paper and corrugated products. Envelopes open along the first dimension. 1000 per case.