The accessible Hohner HA-3100 Panther GCF Diatonic Accordion shares many of the quality features of Hohner's step-up diatonics with a lower price tag, including 31 treble keys, 12 bass/chord buttons, and two sets of treble reeds. It plays in G, C and F. The Hohner HA-3100 accordion is 12"H x 7-1/2"D and weighs 9 lb.