Features 4-octave Very portable Great price Kelon bars Oblong resonators Description Product Description Musser M31/7031 Windsor II 4 Octave MarimbaSuperb sound. 4-octave Kelon keyboard, durability, and easy portability make the Windsor II a perfect choice for the touring pro. The attractive price makes it equally perfect for school use. Oblong resonators, finished in satin silver lacquer, give this instrument exceptional carrying power and resonance. The sturdy frame features folding metal legs with dependable locking braces. Keyboard and resonators remove quickly for pack-up. Supplied with mallets and shallow drop cover.