3M™ Non-Printed Packing List Envelope NP6 is a 9.5 in x 12 in unprinted, clear, side-loaded polyethylene envelope with easy and secure open and close. This envelope is designed with a high-tack rubber resin adhesive that sticks on contact to packages. Oil- and water-resistant, this packing list envelope securely protects documents from damage throughout delivery.Keep packing slips, invoices, catalogues, cards and other shipping documents safe and secure with 3M Non-Printed Packing List Envelope NP6. This 9.5 in x 12 in, clear, polyethylene envelope features easy open-close and re-open and a high-tack rubber resin adhesive that sticks immediately upon contact. Oil- and water-resistant, the Non-Printed Packing List Envelope NP6 is built to withstand the toughest handling conditions.