These standard 200-lb. corrugated shipping cartons are made from strong 200-lb/ECT-32-C flute kraft or white fiberboard. Precision-cut, regular slotted containers (RSC) form strong corners that make the packaging ideal for stacking applications. Strong 32-lb. edge crush test, boxes are approved for shipment via UPS, FedEx Ground, Parcel Post and rail. Our 200-lb. stock boxes are conveniently packed in small bundles, so you only have to buy the quantity you really need. Packaging are shipped flat to save space.