Mail Express has both the stronger type shipping boxes and the less expensive Moving Boxes. Since Mail Express is a UHAUL Dealer we usually use Uhaul Boxes for moving. We have discount prices on bubble wrap, tape, loose fill peanuts, stretch wrap and have hundreds of boxes in stock. And remember, Mail Express has Free Delivery of Packaging and Moving Supplies in Salt Lake City with orders over $50. Mail Express carries a complete line of UHAUL supplies but we specialize in local Cargo Vans (inside dimension: 9 feet long by 5 feet 7 inches wide by 4 feet 5 inches tall).