Custom Injection Molders | Innovation by Design PRe Plastics is a custom plastic injection molding company providing full-range services for complete product development and production: part design & engineering, 3D prototyping, precision tool making, injection molding, part assembly, printing, decorating, and order fulfillment. PRe Plastics is ISO 9001:2015 certified, and holds a State of California and Federal FDA Device Manufacture License.