Please note that this is a used item and is sold as-is, with no returns or refunds. This is an SM3 model from before the minor change. It produces a clearer sound than the current SM3 model. I used it for about 4 months. I am selling it because I have been using it less frequently. There is some plating wear on the shank. It has undergone GAT acoustic treatment (see photo 7). This mouthpiece allows you to produce sound with less effort. A GAT Custom Brass sticker is also included.