Our 10" x 10" x 3" 200#/ECT-32 Flat shipping boxes feature a durable, corrugated construction that protects and conceals shipments to help ensure safe arrival. These shipping boxes meet requirements for 200#/ECT-32 kraft C-flute single wall corrugate. The small depth on these boxes make them ideal for packaging books, frames, artwork, mirrors, scales and round or flat items.