Dallas Piston is a contemporary stool with a comfortable upholstered seat and backrest on an adjustable gas piston base that swivels and also adjusts easily from a counter height to a bar height with a lever that activates the gas piston mechanism. The solid steel round/square base is available in chromed steel. The seat has a steel structure with “S” shape springs for extra flexibility and strength. This steel frame is molded by injecting polyurethane foam. Dallas seat is upholstered with a removable velcro enclosed leather, PPM, or leatherette slip cover. This modern stool is suitable for both residential and commercial use.