# 3 White Carton 1 Side Out * 275# Single Wall * When you are shipping heavy items, you run the risk that they could puncture the walls of the carton or fall right through the carton completely. Instead of investing in expensive shipping options like a crate, you can buy one of the heavy duty cartons. We sell both single wall and double wall cartons to give you the protection you need to get your items safely to their final destination. The cartons are almost 50 percent stronger than standard shipping boxes, and they can withstand many pounds of pressure, ensuring that they don’t crumple or dent when stacked with other boxes on a crowded delivery truck. Your carton – and the item inside it – should arrive in the same condition that you sent it out. Cartons are sold in bundles, and they are shipping flat to make them easier to manage.