Printed with Packing List/Invoice Enclosed in bold letters these 3M packing envelopes are a must-have when fulfilling customer orders. To adhere the packing list/invoice enclosed envelopes just peel off the back to reveal the permanent adhesive. Secure strong self-adhesive backing sticks to any surface any shape. Easy-to-see - bold orange color can t be missed. Full view envelopes come in a case of 1 000.