We offer a large selection of Un-Printed Press on Packing List Envelopes. You can search many types of Front-Loading Press-on Envelopes with Recessed Face, Front-Loading Press-on Envelopes with Overlip, Front-Loading Press-on Envelope with Overlip & Slits on Release Paper, High Tack Back-Loading Press-on Envelopes, Back-Loading 5 Mil Face Stock Press-on Envelopes, Back-Loading High-Density Press-on Envelopes, Back-Loading Orange Tinted Press-on Envelopes, Back-Loading Press-on Envelopes and Back-Loading Press-on Envelopes - Perforation on Face. Press-on Envelope with perforation on face just peel and stick to protect invoices and shipping documents from dirt and moisture. Pressure-sensitive adhesive sticks aggressively to paper, metal, wood, corrugated, or plastic.