Luxfer Holdings PLC, a materials technology company, designs, manufactures, and supplies high-performance materials, components, and high-pressure gas cylinders for transportation, defense and emergency response, healthcare, and general industrial end-market applications. It operates in two segments, Gas Cylinders and Elektron. The Gas Cylinders segment manufactures and markets aluminum, titanium, and carbon composite cylinders, which are used for self-contained breathing apparatus that are used by firefighters and other emergency-responders, as well as scuba divers and personnel in potentially hazardous environments, such as mines; and aluminum and composite cylinders for use in the containment of oxygen and other medical gases that are used by patients, healthcare facilities, and laboratories. This segment also offers carbon composite cylinders for compressed natural gas and hydrogen containment in alternative fuel vehicles; lightweight aluminum cylinders for a variety of industrial