Sturdy, plastic construction. Smooth and seamless, one-piece molded truck bodies with reinforced lip are rounded and easy to clean. 4-in. center swivel back caster provides easy maneuvering. Durable, one-piece. 10-in. in-set wheels offer low maintenance and protect surroundings. USDA & FDA Compliant materials. Powder-coated steel frame for corrosion resistance. Black.