Hohner Big River Harmonica with Rack Combination Set The perfect entry level German made harp Responsive, durable comb, and solid brass reed plates for premium performance 10 hole diatonic harmonica, tuned to the Key of C Patnted MS Series construction provides for component replacement, as well as customization The Hohner HH01 harmonica holder is smaller and lighter than other harmonica holders yet still offers a rubberized neck brace and a sturdy frame Double wing nuts are lock your harmonica into playing position.