Chemical resistant ABS plastic thermoformed construction. Corrosion resistant external components. Rugged oversize hinges. Bulb rubber gasket provides virtual air tight seal. Models with stay clear acrylic viewing window(s). Internal dual latch closure with one quarter turn handle. High visibility white graphics. UV stabilized brilliant red color. Suitable for 6 to 30lb extinguishers-stored pressure or cartridge operated. Reinforced case bottom.