These very special chimes are tuned on the Chinese Lu musical scale for exceptionally pure tonal values.They feature two rows of 45, 1/4" diameter, anodized, aluminum alloy chimes. LP Lu Bar Chimes incorporate the same Kevlar? cord, for strength, stringing style, and shorter sustain, like the LP Studio Series. ***LP Bar Chimes now come in a protective tube that can be used again and again for transporting your chimes safely.***