We are the harmonica manufacturer of the EASTTOP brand. This is Easttop 10holes professional blues diatonic harmonica,professional musical instrument Easttop laser logo Material:phosphor bronze reeds with rivet ,brass reedplate,stainlee steel cover,ABS comb Packing:each harmonica into one plastic box Key: C key Content:harmonica+small cloth+plastic 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 there’s 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.