These are "bongo drums," a representative percussion instrument of Latin music. I used these a long time ago, but I decided to organize and sell them during my year-end cleaning. Please use this instrument differently depending on whether you are playing while seated, holding it between your legs, or playing while standing with it set up on a bongo stand. The dirt on the leather is due to age, but both the large and small ones retain their striking sound and resonance, so I believe they are usable. How about using the bongos for fun musical time, such as family singing contests to the rhythm of the bongos during spring or summer breaks and family gatherings, or playing along with children's recorders or melodicas? The tension on the drumhead has been loosened to relieve stress on the skin. Please tighten the screws to your desired pitch before use. I will pack them carefully and ship them.