18×18×21″ Corrugated Shipping Box – ECT 32C Single-Wall – 25 per Pack

Level up your large-item shipping with our 18×18×21″ Corrugated Box (ECT 32C). This beast packs a whopping 4 cubic feet of space—perfect for bulky or oddly shaped goods. Built from ECT 32C single-wall kraft, it delivers reliable strength under pressure and handles rough delivery conditions like a champ. Bonus: it’s made with 100% recycled material and is fully recyclable, making it a smart pick for eco-minded businesses.