Miller 5 Cu. Ft. 20-Gauge Steel Contractor-Grade Wheelbarrow. This durable wheelbarrow is designed for homeowners, landscapers, and construction work. It is ergonomically designed so that 80% of the load is on the wheel, not your back, reducing strain and fatigue. Specially designed to clear 27 In. doorways or gates, it features a standard air tire with a tube for smooth rolling.