Hohner Marine Band Special 20 5-Piece Pro Pack - Keys of G, A, C, D, & E 5 Special Twenty Harmonicas in a Zippered Neoprene Carrying Case that can hold up to 7 standard sized 10-hole harmonicas). Keys of G, A, C, D, & E Injection molded plastic comb with projecting mouthpiece for added playing comfort Stainless steel covers with closed sides; exceptionally airtight Recessed 0.9 mm brass reed plates, mounted with screws