The 63.5Z is an ideal mouthpiece for players that find the 63Z too constricting, and the 64Z a bit large. Originally designed for Kevin Meads while he was playing for Maynard Ferguson.

63S GR Trumpet Mouthpiece
• Standard GR rim contour: a balance of medium characteristics, this rim is comfortable and should be easy for most players to adapt to quickly. The width may feel a bit more generous than traditional rims and will aid endurance. Flexibility is good and articulations will be cleanly defined.
• .63" rim diameter, between a Bach 10½ and a Bach 7
• S cup: The versatile GR S cup can be used in varied musical situations. The sound is big and brilliant. Projection is excellent. The backbore is the GR #1, with good core to the sound. The S Cup volume is small, though it has ample lip room for most players. This is an ideal solution to those who bottom out on conventional commercial cups. The alpha angle is not too high and does not impinge the lips; furthermore, it has the ability to lightly grip and keeps the lips held into place for great endurance. This cup is great for lead, show work, studio work, and all-around playing.

63MS GR Trumpet Mouthpiece
• Standard GR rim contour: a balance of medium characteristics, this rim is comfortable and should be easy for most players to adapt to quickly. The width may feel a bit more generous than traditional rims and will aid endurance. Flexibility is good and articulations will be cleanly defined.
• .63" rim diameter, between a Bach 10½ and a Bach 7
• MS cup: has a slightly lower alpha angle, greater cup volume, a slight increase in cup depth, and a larger backbore---the GR #2---than the S cup. This is a great all-around cup with a huge, brilliant sound. The added volume and a slightly lower alpha angle give the player more lip room: an ideal solution for players who find that the GR S cup is a bit tight for them. The sound is big and full with an excellent core. It has less edge than the S cup and works well in all playing situations.

63M GR Trumpet Mouthpiece
• Standard GR rim contour: a balance of medium characteristics, this rim is comfortable and should be easy for most players to adapt to quickly. The width may feel a bit more generous than traditional rims and will aid endurance. Flexibility is good and articulations will be cleanly defined.
• .63" rim diameter, between a Bach 10½ and a Bach 7
• M cup: has the same backbore as the MS Cup: the GR #2. The M Cup has a slightly lower alpha angle, more volume and depth and greater lip room than the MS Cup, though the playing characteristics are similar. Works very well in a variety of playing situations from commercial to concert work. An ideal all around mouthpiece with a compact core, vibrant feel, and full of overtones. This is the most popular GR Cup.

63Z* GR Trumpet Mouthpiece
• Z* rim contour: medium bite---slightly more than the Standard rim
• .63" rim diameter, between a Bach 10½ and a Bach 7
• Z cup: has a small cup volume with a fat, brilliant, powerful sound throughout the range, and an astonishingly easy upper register. While most conventional commercial cups tend to shut off vibrations and have a thin tone, the Z cups have the chop room to allow for free lip vibrations which produce clean articulations, and a full commanding sound from low F# to above double C! The Z cups features a higher alpha angle than the S Cup and longer L1 to achieve optimum lip room for vibrating freedom, support for compression and crisp articulation. The Z* rim has a medium bite and the Z** rim has a softer bite; otherwise the Z cup parameters are basically the same. This is an excellent choice for commercial playing, big band, lead-work, marching band, drum corps, and recording. This mouthpiece will really Zing from top to bottom.

63Z** GR Trumpet Mouthpiece
• Z** rim contour: slightly rounder with less bite than the Standard rim
• .63" rim diameter, between a Bach 10½ and a Bach 7
• Z cup: has a small cup volume with a fat, brilliant, powerful sound throughout the range, and an astonishingly easy upper register. While most conventional commercial cups tend to shut off vibrations and have a thin tone, the Z cups have the chop room to allow for free lip vibrations which produce clean articulations, and a full commanding sound from low F# to above double C! The Z cups features a higher alpha angle than the S Cup and longer L1 to achieve optimum lip room for vibrating freedom, support for compression and crisp articulation. The Z* rim has a medium bite and the Z** rim has a softer bite; otherwise the Z cup parameters are basically the same. This is an excellent choice for commercial playing, big band, lead-work, marching band, drum corps, and recording. This mouthpiece will really Zing from top to bottom.

63SZ GR Trumpet Mouthpiece
• Standard GR rim contour: a balance of medium characteristics, this rim is comfortable and should be easy for most players to adapt to quickly. The width may feel a bit more generous than traditional rims and will aid endurance. Flexibility is good and articulations will be cleanly defined.
• .63" rim diameter, between a Bach 10½ and a Bach 7
• SZ cup: recommended for players who feel the Z cup provides too little lip room, has an alpha angle that is too high, or a rim that is too flat. A great choice if the S cup doesn’t provide enough compression for range requirements and articulation, or enough edge to the sound. The SZ cup has the rim and alpha of the S cup and the bottom of the Z, with the GR #1 backbore. The GR Mouthpiece Design Program makes a mathematically perfect design that features less volume than the S cup but more than the Z cup. This design allows for the lip room of the S cup with the edge and compression of the Z cup. The SZ has a powerful big sound and a full sound spectrum, good endurance and added compression for a strong upper register with superb articulation. The SZ cup is outstanding for lead work, marching band/drum corps, Latin, jazz, and studio work, great for microphone work and records well.

63.5Z GR Trumpet Mouthpiece
The 63.5Z is an ideal mouthpiece for players that find the 63Z too constricting, and the 64Z a bit large. Originally designed for Kevin Meads while he was playing for Maynard Ferguson.
• Standard GR rim contour: a balance of medium characteristics, this rim is comfortable and should be easy for most players to adapt to quickly. The width may feel a bit more generous than traditional rims and will aid endurance. Flexibility is good and articulations will be cleanly defined.
• .635" rim diameter, just wider than a Bach 7
• Z cup: has a small cup volume with a fat, brilliant, powerful sound throughout the range, and an astonishingly easy upper register. While most conventional commercial cups tend to shut off vibrations and have a thin tone, the Z cups have the chop room to allow for free lip vibrations which produce clean articulations, and a full commanding sound from low F# to above double C! The Z cups features a higher alpha angle than the S Cup and longer L1 to achieve optimum lip room for vibrating freedom, support for compression and crisp articulation. The Z* rim has a medium bite and the Z** rim has a softer bite; otherwise the Z cup parameters are basically the same. This is an excellent choice for commercial playing, big band, lead-work, marching band, drum corps, and recording. This mouthpiece will really Zing from top to bottom.