This is a SMACK snare drum mute. I received it from someone who played in a German orchestra. It's made of something like a sheet of iron wrapped in leather. I'm selling it because I no longer use it. I don't think it was originally for sale, so I don't know the details. It looks quite worn. I cannot accept any claims after purchase. Please understand that it has been stored by a private individual. Percussion Snare drum Snare drum Mute SMACK Germany Berlin