This Yamaha YX-500F 3-1/2 Octave Professional Acoustalon Xylophone offers schools, ensembles, and professionals a great option for any performance situation. It comes with durable Acoustalon bars and a sturdy concert frame that is height-adjustable via gas shocks, making it easy for you to make adjustments quickly and easily. Featuring two-position resonator slots and graduated bars, you will experience amazingly consistent tone across all octaves of this fine piece of craftsmanship. Its uniform bar size gives you the ability to swap out a second set of bars for practice or a specific performance setting. Includes cover.