These heavy-duty 275-lb. test boxes are 38% stronger than 200-lb. test boxes. Perfect size and weight for shipping 17" monitors. Industrial-weight corrugated fiberboard boxes meet all federal specifications for mailing and shipping via UPS, FED EX, truck,rail and parcel post. Shipped flat and bundled for compact storage. Larger quantities, e-mail us at firstname.lastname@example.org for quote.