Greenbrier offers three covered hoppers specifically designed for dry bulk products. All are ideally suited for plastic pellets and other free-flowing, light density products, these railcar provide both the shipper and receiver with the highest quality covered hopper railcar in the industry. From top hatches to bottom unloading gates, Greenbrier’s covered hoppers are built to protect against even the smallest product contamination. Various roof hatch configurations and outlet gates are available.