Serpac Electronic Enclosures of Southern California manufactures plastic enclosures made of ABS material. Most enclosures are designed for hand-held or desktop applications including sensors, transmitters, test equipment,......Serpac Electronic Enclosures of Southern California manufactures plastic enclosures made of ABS material. Most enclosures are designed for hand-held or desktop applications including sensors, transmitters, test equipment, relays, charging stations, and others. Recently added is the R-Series, a line of waterproof airtight cases.