Come to my 10MFAN website and read about these revolutionary and proprietary octagon chamber with chamber panel mouthpieces! These are brand new, and I have one for alto and one for tenor. It is part of my Octagon Series, and I will be adding to this with new mouthpieces as time goes on. Finally all fresh and original design mouthpieces hand finished by Brian Powell and Erik Greiffenhagen that feature this incredible chamber. I’ve had this idea for years and finally with 3-D printing it was possible. Come to my 10MFAN website to read about these and listen to the videos that are coming in!