Vestil Heavy Duty Plastic Platform Trucks will not rust, discolor, or warp—Maintenance-free and easy to clean. Honeycomb construction is reinforced for longer life. Extra square steel tube underneath the platform to reinforce deck strength. Units roll smoothly on 6" x 2" polyurethane casters. The four-wheel cart has two rigid and two swivel casters, while the six-wheel cart has four swivel and two rigid casters. Handle height 34".