Roura Material Handling is the original producer of the Self-Dumping Hopper. Founded in 1915, Roura has devoted more time and resources to product development than any other hopper manufacturer, maintaining leadership in the industry and keeping the Roura Hopper the top of the line. Roura is one of the leading manufacturers of hoppers for a variety of industries with many different uses and applications. Roura Hoppers will handle almost any material, wet or dry, hot or cold.