This is a RSR Vintage series mouthpiece for the tenor sax. This piece was originally a 6 but was opened by James Bunte to a 7*, now measuring .105”. It is made from a hard rubber composite and is very light, leading to a nice resonance that you can really notice when playing. The piece is in mint condition with no wear of note. Bunte’s work on the tip and rails is perfect. This is a very dark playing mouthpiece, it has a large round chamber and little baffle.