Stadler Rail AG is a Swiss manufacturer of railway rolling stock based in Bussnang, Switzerland. Established with a focus on regional multiple unit trains and trams, the company has since diversified into the production of rapid transit, high-speed rail, intercity, and sleeper train vehicles. Stadler is also among the few remaining manufacturers of rack railway rolling stock. The manufacturer supplies numerous Flirt and KISS trainsets, as well as the famous EuroDual locomotive and trams.