Suzuki glockenspiels are mounted on selected hardwood resonator boxes. The bars are made of durable aluminum alloy. The Alto glockenspiel is pitched the same as the Soprano metallophone but has a lighter sound. Complete with two pairs of double-headed mallets. (43.5cm x 19.9cm x 6.1cm). C5-A6, 1 Bb, 2 F#s, 2 pairs of mallets.