Quality Machined Plastic Components Precisely what you need...precisely when you need it! Mattson/Witt Precision Products has been machining custom plastic components for more than 50 years for customers around the world who rely on our unmatched expertise, quality and affordability. We're ready to be your Preferred Choice for Custom Plastic Machining. Mattson/Witt is geared entirely to the strict demands of plasticsand plastics alone. Our ISO9001:2000 certification is proof positive of our commitment to quality that's reflected in our people and our productsone more value built into every one of our custom plastic solutions. Mattson/Witt will work with your plastic machining design to produce prototypes, production parts or assemblies...or all three!