7 1/2 x 5 1/2" Yellow "Return Documents Enclosed" Envelopes (PL448)

7 1/2 x 5 1/2" Yellow "Return Documents Enclosed" Envelopes. Pressure sensitive envelopes secure and protect documents that are attached to the outside of shipments. Pre-printed with specialty use messages on heavy 2 Mil poly. Hot melt adhesive backing provides strong adhesion to paper and corrugated products. Envelopes open along the first dimension.