3M Non-Printed Perforated Packing List Envelope FED1 is a 6.75" x 10.75" unprinted, clear, perforated polyethylene envelope with easy and secure open and close. We designed this envelope 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.