Berg Larsen metal mouthpiece. For alto saxophone. I'm using this with a Selmer Axos, but I had to have a repair person shave down the ring at the tip of the neck to use it. The cork also needs to be re-wrapped thinner. It was relatively easy to control, but I ended up going back to a rubber mouthpiece, so I'm selling it. The included ligature is poorly made and warped. It's usable, but I was using one for a Yanagisawa metal mouthpiece.