Heavy-Duty bulk box truck easily assists in transporting any variety of bulky material or trash. Seamless polyethylene molded construction will not leak and has smooth walls and corners for easy cleaning. Step-wall design offers greater sidewall strength to prevent bulging. Trucks nest when empty to save space. Powder coated steel chassis offers greater load capacity. 2 swivel, 2 rigid TPR-rubber casters for smooth rolling. TPR rubber is a wheel tread comprised of rubber and plastic, precision molded and mechanically bonded to a polyolefin core. These exceptional casters provide smooth cushioned non marking performance. Resists water, oils, grease, solvents and many other chemicals. Limited 1 year warranty.