Concert Quality diatonic metallophone. Each bar is manufactured from the finest quality alluminium alloy and are skillfully overtone tuned for perfect pitch and harmonics. Metallophone offer Mallet Storage, Chromatic Bar storage, bottom positioned bar holding pins note name labeling inside each resonator chamber. Diatonic metallophone includes one B b and two F # bars (exchange these with the fitted B or F notes to play additional scales) complete with appropriate mallets plus a damper bar with adjustable handle.