Harry Hartmann Fiberreed Carbon Classic Reed Alto Saxophone Medium Fiberreed Carbon Classic Reed Alto Saxophone Medium Harry Hartmann's carbon classic fiberreed for alto saxophone features a superior hollow fiber layered with carbon fiber The thicker classic cut features a warm, dark low end and a brilliant high register and altissimo range Harry Hartmann's carbon classic fiberreed for alto saxophone features a superior hollow fiber layered with carbon fiber The thicker classic cut features a warm, dark low end and a brilliant high register and altissimo range