16 - 20 x 3mm bars. C' - A" with F#', Bb', and F#" bars. Silver steel alloy. Overtone-tuned precisely to A440. All-birch resonator boxes with glued seams for resonance and tonal clarity. Flexible rubber pins allow easy removal/replacement of bars. Boxes fitted with brackets for adjustable legs or mobile stand. Reinforced endplates for carrying support Includes mallets.