Easttop 24 Holes Professional Tremolo Harmonica T2406 Musical Instrument (B) This is Easttop 24 holes professional tremolo harmonica Musical Instrument Material:phosphor bronze reeds with welded,brass reedplate with electroplate,brass cover with electroplate,ABS comb Content:harmonica+small cloth+leather box,B key Packing: each harmonica into one leather box Maintain and clean tip: Use 70% ethyl alcohol,and spray on the cover and comb,after about 15 seconds,use the cloth to wipe the surface. No heat,no hair dryer,no sunlight,just air-dry. If theres some small things in the comb,you can brush lightly with a very soft brush.Do not use sharp tool,it will damage the reeds. If you want to open the cover,pls be carefully to save the screw.