GMT develops and manufactures customized air spring bellows and air spring systems for several light-rail vehicles and high-speed trains. Customer-specific requirements are implemented carefully so that products comply with fire protection specifications acc. to HL3 or to EN45545, as well as requirements of various operating conditions with outside temperatures of -40°C (-40°F). GMT offers static and dynamic testing facilities with several 3D and 4D testing machines setting benchmarks in the field of secondary suspension.