25 12x4x4 Cardboard Boxes Corrugated for Packing Shipping Moving & Storage. 100 percent recycled corrugated box for packing, shipping, and storing. 32 ECT grade for standard stacking performance. Made of single wall C flute corrugated fiberboard with standard kraft color. Note:For return policy in non product problem,customer has to response for shipping fee and 15% restore fee,And please return within 14 days.