Sparco Pre-Labeled Waterproof Packing Envelopes - Packing List - 4.50 Width x 5.50 Length - Self-adhesive Seal - Low Density Polyethylene (LDPE) - 1000 / Box - White

Pre-labeled envelope features a waterproof and oil-proof design to ensure your package is secure. Front is printed with "Invoice/Packing List Enclosed." Self-adhesive offers a quick and easy way to seal your package without the need to moisten. Top layer is made of an LDPE 30 micron adhesive.