26 Key 48 Bass Piano Accordion. Keyboard 26 Notes B-C, Six Bass Rows Eight notes each, Counter Bass, Fundamental Bass, Major, Minor, 7th and Diminished Chords. New, Fitted NAC Roll Away Trolly Case Designed for Maximum Protection, featuring a Telescoping Handle. New, 2.5" Wide Leather Straps with Harness, Designed for Maximum playing comfort. New grill with improved switch plate design.