Sonor NKS60PO, Tone F-sharp, Contra Bass Chime Bar, 7 available chime bars: F, F-sharp, G, G-sharp, A, B-flat, B, type contra bass, overtone tuning, palisono bars 55 x 20 mm, resonator per chime bar made of pinewood, ply-wood, unit 1 chime bar. The Palisono chime bars KS 50 PO, NKS 60 PO and NKS 100 PO have sound bars with overtone tuning and resonator boxes made of pine wood. All resonator boxes have tuning adjusters, to change the sustain and volume.SONOR developed special feet for these instruments, which provide optimum resonance. Recommended mallets: SCH 15, SCH 8 or SCH 100.