This is an alto saxophone mouthpiece by Theo Wanne. - Brand: Theo Wanne - Model: Essentials Concert 4 Purchased from Theo Wanne's website. Imported from the home country. I am selling it because the tone and playing feel were slightly different from what I was looking for. It produces a dark, all-around tone suitable for both classical and jazz. Subtones were very easy to produce. It has only been used a few times, so there is no deterioration of the patch, etc.