Our 4" x 4" x 6" 200#/ECT-32 Standard-size corrugated boxes are designed to cater to all of your shipping and storage needs. The rigid cardboard construction protects contents and stacks securely. These 4 x 4 x 6 shipping boxes are made from 200 Pound test, kraft C-flute single wall corrugated carton. Great for packaging office supplies, small-sized or round-shape items.,