Long smooth white All Board Envelopes, measuring 170mm x 440mm – a length considerably longer than its width. A smart-looking product made from premium grade 500 micron, 350gsm, GD2 fully coated chipboard. They’re quickly sealed with a pre-folded flap that has a peel and seal strip to speed up your despatch. Use for despatching paper, card and slim items that need additional protection during transit. You can print onto their coated surface, or stick self-adhesive labels to it.