Profile: Roechling Machined Plastics develops plastic products. We also supply Polystone® thermoplastics. We market sprockets, filtration rings & wearstrips for the waste water treatment industry. Our Polystone® matrox exhibits extremely low surface friction to promote the flow of materials in bins and hoppers. Our products include tracks, chain guides, gears and starwheels. Our perma-bolt stud and nuts are manufactured from a vinylester based fiberglass reinforced plastic material.