THE MARIMBA ONE 3100 ROSEWOOD MARIMBAThe Marimba OneI 3100 is by far the most durable and rigid concert frame on the market. The end frames have more wood than our Izzy frame and we laser engrave tape measures into the end frames so you always know the exact keyboard height. To raise and lower the marimba, simply turn a handle at each end frame. You can choose to have our all-wood rails or our new black aluminum-and-wood rails. 100% designed and built in our California factory.FEATURES5.0 Octave Rosewood BarsA=440, A=442 or A=443 tuningDurable mahogony wood Frame.All mahogony wood or aluminum-mahogony wood railsMicro-precision height adjustment system with built-in tape measureDurable black powder-coated resonators.4" locking wheels