roura iron works is,the original producer of the self-dumping hopper. the roura hopper has become a major material handling problem solver in a wide variety of manufacturing industries. the standard duty models are 3/16" plate bodies with 5/16" formed bases, and are available in sizes from 1/4 yd to 10 yd. hoppers are also available in light duty, heavy duty, extra large strengths. our specialty items include: open side hoppers, de-waterting hoppers, self-dumping refuse hoppers and rotator boxes. we also make custom sizes to suit your special applications. hopper capacities range from 2,000# to 10,000#.