Simplify stockroom packing processes with these Coastwide Professional 18 x 18 x 12-inch shipping boxes. Give customer orders a durable mailing solution with these shipping boxes. The 32 ECT rating ensures stacking strength, while the generous dimensions offer ample space for customer products and packing materials. With 20 pieces in each bundle, these Coastwide Professional 18 x 18 x 12-inch shipping boxes make it easy to keep your warehouse stocked. Shipping boxes help ensure items are protected during shipping. Overall dimensions: 18"L x 18"W x 12"H. 2.25 cu. ft. Square shipping box. Kraft. 20 per bundle. 32 ECT. C: 39-43 flutes per foot. This product is manufactured for WorkLife Brands LLC by a certified MBE (minority owned business). Sold as 20/Bundle.