LP Whole-Tone Bar Chimes are uniquely tuned on the interval structure of the whole-tone musical scale. They feature 3/8" diameter, anodized, aluminum alloy chimes and incorporate the same Kevlar? cord and self-dampening stringing style as LP Studio Series Bar Chimes. LP Whole-Tone Bar Chimes are available in 72 chime double row bars. ***LP Bar Chimes now come in a protective tube that can be used again and again for transporting your chimes safely.***