The YM-2400C 4 1/3 octave Acoustalon™ marimba has an A25-C76 range, three-position resonator slots, height adjustable frame, dual angle supports and horizontal leg supports. Acoustalon ™ bars are produced from fiberglass reinforced plastic in a one-step manufacturing process. They provide exceptional durability and a pure tone; the scientifically designed Sonic Tones Holes produced in this process give Acoustalon bars a tone similar to rosewood. Graduated tone bars promote full tone quality and projection. Hinged resonators and rails, along with a two-piece crossbar, make tear down a simple task. The concert frame has oversized 4" casters to allow for easy transport over rough surfaces. Includes protective drop cover.