Model: SU-21H Available Keys: 28* Range: 21 (double) hole Cover Plates: Brass, chrome plated Body: ABS Dimensions: 164x31x23 Weight: 128g *Remarks: The SU-21H is our most popular Tremolo Harmonica. Available in 28 keys, including 14 Major and 14 Minor (Natural Minor special order only) Accessories: Case, cleaning cloth.