Home > Trumpet > 3 Series: .660" / 16.76mm


The GR 3 Series cup diameter is similar to a conventional 3 diameter. The 3M is a very popular choice for 3C players looking for a familiar feel but with more core in their sound and more improved articulations. All 3 Series GR Mouthpieces have the same rim and alpha angle. This provides a consistent feel between all GR 3 Series Models, allowing the feel to be the same to easily meet any musical demand.
Classic Blank is standard. Symphonic Blank is standard on the HC** model.

Models Backbore Cup Volume Cup Volume Cup Diameter r2 r4 Rim
3 Number Description Cubic Inches Inch mm Fraction @.032" Contour Bite Alpha Angle
3XS 1 Very Small 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3S 1 Small 0.0708 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3MS 2 Medium Small 0.0766 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3M 2 Medium 0.0806 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3MX 3 Medium Large 0.084 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3HC* 3 Medium Large 0.0836 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3HC** 3 Medium Large 0.0839 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium
3VC 3 Medium Large 0.0857 0.66 16.76 42/64 0.677 Semi Flat Medium Soft Medium


3 Series Trumpet Mouthpieces