These all-steel hoppers were one of the most widely used of the United States Railway Administration (USRA) designs. Some 22,000 cars were built for 23 US roads, where the served from 1918 to 1972. In 1922, the design adopted by the American Railroad Association as a standard plan. Highly detailed kits feature fine plastic parts with separate wire grab irons and complete instructions.WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov