The Partners Brand 181818V3C brown single wall corrugated boxes offers advanced protection from external weather conditions. It is designed using water-resistant adhesive that keeps the stored goods away from water damage and provides maximum protection for equipment and parts. Its square shape gives you more room to store your items. This mailer measures 18"H 18"W 18"D in size. It is shipped and stored flat to save space. Brown colored single wall corrugated construction. Dimensions: 18"H 18"W 18"D. Capacity: 3. 38 cu. ft. Pack Size: 10/Bundle. The Partners Brand 181818V3C brown single wall corrugated boxes offers enhanced protection from external damage, making it an ideal choice for shipping.