This series was developed in cooperation with Jean "Toots" Thielemans, the grand old man of jazz harmonica. Toots recommends the Mellow Tone with standard-thickness reed plates for ballads or classical pieces, and the Hard Bopper with thicker reed plates for more up tempo or brighter contemporary material. 7539/48/C 12 Holes 48 Reeds Pearwood Comb Speacially Embossed Stainless Steel Cover Plates Stainless Steel Mouthpiece Stainless Steel Slide & Button 1.2mm Brass Reed Plates Key of C Made in Germany.