This is a GlockenSpiel NG-10 glockenspiel made by Sonor (ゾノア) in Germany. The keys are removable. The back has been subtly shaved for tuning. The basic scale is an 11-note C major scale, but it can be changed to G major or F major by replacing the included keys. Two mallets are included. The glockenspiel is approximately 32cm long, and the mallets are approximately 20cm long. Please understand that this is a used item that has been used and stored in a home.