The 10K Series mouthpieces are the culmination of 30 years of experience as a mouthpiece maker and 10,000 handcrafted professional mouthpieces sold.  These mouthpieces are computer machined from excellent German rod rubber. I have designed these mouthpieces for beauty of sound, response and excellent intonation. The 10K series mouthpieces are expertly manufactured  for me by master craftsman Wesley Rice of Rice Clarinet Works