Plastics Unlimited was established in 1993 by Terry and Nancy Kieffer. Located in Preston, Iowa, we produce custom thermoform ... ed plastics, urethane products, and our patented TEC process. Our staff of mold designers, mold makers, and production personnel provide our customers with "Unlimited Quality and Service", just as our quality policy states. We are certified to AS9100 Rev D. Contact us today, and let us provide you with the level of excellence needed in today's marketplace. read more