General Supply Brown Corrugated - Fixed-Depth Shipping Boxes, 6l x 6w x 4h, 25/BundleProtect shipping contents with sturdy 200-lb.test corrugated Kraft boxes. Constructed of heavy-duty ECT-32-C Flute corrugated material. Shipped flat. Assemble with shipping tape (sold separately). Mailing Boxes/Tubes Type: Shipping Carton; Length: 6"; Width: 6"; Depth: 6".