Industrial strength construction transports heavy loads with ease.Seamless one-piece molded truck bodies with reinforced lip Sturdy, plastic construction won't rust, dent, chip, or peel and is easy to clean. 4" (10.2 cm) center swivel back caster provides easy maneuvering. Durable one piece, 10" (25.4 cm) blow-molded polypropylene inset wheels protect surroundings. Powder coated steel frame for corrosion resistance.