Heavy duty construction provides greater protection and stacking strength. These cartons are 40% stronger than standard shipping containers. Sold and shipped flat in bundle quantities. • 275#/ECT-44 (Edge Crush Test) - holds up to 95 lbs. • Heavy-Duty boxes provide added protection to ensure that your shipments arrive safe. • Meets most mailing and shipping carrier specifications. • Contains a minimum of 30% recycled content. • Staples Brand 100% Satisfaction Guaranteed. • Dimensions: 18 x18 x12 . • Capacity (Cu. Ft.): 2.25. • Manufactured from heavy duty 275lb /ECT 44 single wall kraft corrugated. • 25/Bundle. • Sold as 25 Each Per Bundle.