MAC Plastics Manufacturing Inc. is a custom plastic extrusion and injection molding company headquartered in Olney, Illinois. MAC Plastics also has a 2nd Plastic Extrusion Plant located in Hamilton, Indiana. MAC Plastics has made a name for itself as one of the leading plastics manufacturers in the United States. MAC Plastics takes pride in providing their customers in many different industries with the highest quality products, on-time deliveries, and top-notch customer service.