Sonor NKS100P Sub Contra Bass - C-tone chime bar with overtone tuning, 95 x 20mm rosewood bar, pinewood resonator, 5 available chime bars (C, C#, D, D# & E). All resonator boxes feature tuning adjusters, to change the sustain and volume. Sonor developed special feet for these instruments, which provide optimum resonance. Recommended mallets: SCH 16, SCH 15, SCh 8 or SCH 100.