Made from strong corrugated board, this A4 mailing box can withstand the toughest of journeys. The quick and easy Fastfold pop up design allows for almost instant use. The strong adhesive self-seal strip creates a secure closure to keep contents safe during transit, and a simple tear strip allows for easy access when it arrives at its destination. Pre-printed address and sender labels allow for easy identification. Supplied in a pack of 20. With this promotion, when you buy a pack of 20 mailing boxes, you get a Cadbury Heroes Variety Bag absolutely free!