This is a Schilke Symphony D5.1. I used it for heavy-sounding performances. As it has been stored at home for a long time, please refrain from purchasing if you are looking for a perfect item or are sensitive. Points of concern are: Mouthpiece top - There are scuff marks on the part that touches the lips. Mouthpiece bottom - There is plating peeling on the shank due to insertion and removal. - There is a minor crack at the end of the shank. Please purchase if you understand the above description.