McGrath RentCorp operates as a business to business rental company in the United States and internationally. It rents and sells relocatable modular buildings, portable storage containers, electronic test equipment and related accessories, and liquid and solid containment tanks and boxes. The company operates through four segments: Mobile Modular, TRS-RenTelco, Adler Tanks, and Enviroplex. The Mobile Modular segment rents and sells modular buildings designed for use as classrooms, temporary offices adjacent to existing facilities, sales offices, construction field offices, restroom buildings, health care clinics, child care facilities, office spaces, and various other purposes; and portable storage containers. The TRS-RenTelco segment rents and sells general purpose electronic test equipment, such as oscilloscopes, amplifiers, analyzers, signal source, and power source test equipment primarily to aerospace, defense, electronics, industrial, research, and semiconductor industries. It als