These boxes provide twice the protection of a standard carton. Boxes are manufactured from heavy-duty ECT-48 kraft corrugated. Heavy-duty construction provides greater protection and stacking strength. Manufactured from heavy-duty 275# D.W./ECT-48 kraft corrugated. Heavy-duty construction provides greater protection and stacking strength. Cartons are sold in bundle quantities and ship flat to save on storage space and shipping. Box strength: Heavy-Duty Double Wall. Box type: Fixed Depth. Brand name: Partners Brand. Built-in handles: No. Color: Kraft. Dimensions: 15 in. X 15 in. X 15 in. Flute Caliper: B-flute. Foldable: Yes. Height: 15 in. Length: 15 in. Manufacturer: B O X MANAGEMENT, INC. Moisture resistant: No. Preprinted: No. Product Line: Heavy-Duty Double Wall Boxes. Quantity: 15. Stacking Strength: ECT-48. Usage: Moving; Shipping; Storage. Weight capacity per square inch: 275 lb. Width: 15 in.