Interstate Plastics/Dongalen Enterprises Inc. is a company based in San Leandro, California, United States, specializing in providing a wide range of plastics, including ABS, Acetal, Acrylic, HDPE, Polycarbonate, PVC, UHMW, and more. They offer plastic sheets, rods, tubes, profiles, and accessories for industries such as aerospace, agriculture, automotive, construction, electronics, marine, medical, packaging, and transportation. Their products cater to various applications like chemical handling, corrosion resistance, fabrication, insulation, and vacuum forming. Interstate Plastics/Dongalen Enterprises Inc. serves a global market with options for ordering online, by phone, or by mail with efficient shipping and return policies.