Classic Grand Kelon marimba, 4.3 octave, dual resonator track positioning, distortion-free bar suspension system, with mallets, shallow drop cover. Available with concert frame as M300, Moto-cart frame as M360 or All Terrain Frame as M7360. The concert frame is Black plexatone with gold powder coated resonators that are arched and mitered, while the M360 has a motor cart frame that is 2" square steel in black with silver powder-coated resonators that are straight in shape. The M7360 features a heavy duty frame and 8" tires.