Sorry I’m writing in English but I can express my opinion better so here goes. I used Selmer silver plated tenor sax mouthpiece on two different sax for more than 40 years. I always thought it was great. Not until I got this Jody jazz DV beatbox mouthpiece did I prove myself very wrong. It sound like 5x the sound. It feel really amazing to play. I love it. It even plays on my Alto too. I am definitely not an expert, but with this piece, I play like one.