Dave Guardala Booster 2, 18,9mm diameter, fits for following metal mouthpieces: Bari Tenor, Blancher Tenor, Dave Guardala Tenor, Bari Alto, Beechler Bellite Alto, Dukoff Alto, Berg Larsen Alto, Otto Link Alto met. (old Model), Yanagisawa Alto, Jody Jazz Tenor, can be attached directly to the mouthpiece or S-bow, better intonation, easier playability and response, fatter sound, greater dynamic range, chic Dave Guardala design, 100% made in Germany, silver-plated brass

Dave Guardala Booster 3, 20mm diameter, fits for following metal mouthpieces: Aizen Jazz Master Tenor, Bari Tenor, Beechler Tenor, ARB Tenor, Brilhard Tenor, Berg Larsen Tenor, Dukoff Alto and Tenor, Charles Bay Alto and Tenor, Super Jet Tenor, Lawton Tenor, Lebayle Tenor, Meyer Tenor, Otto Link Tenor, RS Berkeley Tenor, Ted Klum Tenor, Yanagisawa Tenor, can be attached directly to the mouthpiece or S-bow, better intonation, easier playability and response, fatter sound, greater dynamic range, chic Dave Guardala design, 100% made in Germany, gold-plated brass

Dave Guardala Booster 2, 18,9mm diameter, fits for following metal mouthpieces: Bari Tenor, Blancher Tenor, Dave Guardala Tenor, Bari Alto, Beechler Bellite Alto, Dukoff Alto, Berg Larsen Alto, Otto Link Alto met. (old Model), Yanagisawa Alto, Jody Jazz Tenor, can be attached directly to the mouthpiece or S-bow, better intonation, easier playability and response, fatter sound, greater dynamic range, chic Dave Guardala design, 100% made in Germany, silver-plated copper

Dave Guardala Booster 3, 20mm diameter, fits for following metal mouthpieces: Aizen Jazz Master Tenor, Bari Tenor, Beechler Tenor, ARB Tenor, Brilhard Tenor, Berg Larsen Tenor, Dukoff Alto and Tenor, Charles Bay Alto and Tenor, Super Jet Tenor, Lawton Tenor, Lebayle Tenor, Meyer Tenor, Otto Link Tenor, RS Berkeley Tenor, Ted Klum Tenor, Yanagisawa Tenor, can be attached directly to the mouthpiece or S-bow, better intonation, easier playability and response, fatter sound, greater dynamic range, chic Dave Guardala design, 100% made in Germany, silver-plated copper

Dave Guardala Booster 3, 20mm diameter, fits for following metal mouthpieces: Aizen Jazz Master Tenor, Bari Tenor, Beechler Tenor, ARB Tenor, Brilhard Tenor, Berg Larsen Tenor, Dukoff Alto and Tenor, Charles Bay Alto and Tenor, Super Jet Tenor, Lawton Tenor, Lebayle Tenor, Meyer Tenor, Otto Link Tenor, RS Berkeley Tenor, Ted Klum Tenor, Yanagisawa Tenor, can be attached directly to the mouthpiece or S-bow, better intonation, easier playability and response, fatter sound, greater dynamic range, chic Dave Guardala design, 100% made in Germany, gold-plated copper