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Trumpet
62 Series: .620" / 15.75mm
63 Series: .630" / 16mm
64 Series: .640" / 16.26mm
64.7 Series: .647" / 16.43mm
65 Series: .650" / 16.5mm
65.6 Series: .656" / 16.66mm
66 Series: .660" / 16.76mm
3 Series: .660" / 16.76mm
66.5 Series: .665" / 16.89mm
66.6 Series: .666" / 16.92mm
66.8 Series: .668" / 16.97mm
66.9 Series: .669" / 16.99mm
67 Series: .670" / 17mm
67.4 Series: .674" / 17.12mm
Zony Series: .679" / 17.25mm
FD Series: Trumpet / Flugel
Flugelhorn
Cornet
Piccolo Trumpet
Signature Series
Brisbois, Gozzo, Hirt
G.O.A.T - M.F.
Louis Dowdeswell
Wayne Bergeron
Carl Fischer
Dan Fornero
Steve Haefner
Eric Miyashiro
Northern Brass
Chase Sanborn
Sparx Cornet
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Mouthpiece Parameters
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Shank / Mass
Contact GR
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GR Mouthpieces
Trumpet
62 Series: .620" / 15.75mm
63 Series: .630" / 16mm
64 Series: .640" / 16.26mm
64.7 Series: .647" / 16.43mm
65 Series: .650" / 16.5mm
65.6 Series: .656" / 16.66mm
66 Series: .660" / 16.76mm
3 Series: .660" / 16.76mm
66.5 Series: .665" / 16.89mm
66.6 Series: .666" / 16.92mm
66.8 Series: .668" / 16.97mm
66.9 Series: .669" / 16.99mm
67 Series: .670" / 17mm
67.4 Series: .674" / 17.12mm
Zony Series: .679" / 17.25mm
FD Series: Trumpet / Flugel
Flugelhorn
Cornet
Piccolo Trumpet
Signature Series
Brisbois, Gozzo, Hirt
G.O.A.T - M.F.
Louis Dowdeswell
Wayne Bergeron
Carl Fischer
Dan Fornero
Steve Haefner
Eric Miyashiro
Northern Brass
Chase Sanborn
Sparx Cornet
Options
Specials
Consultants/Dealers
GR Consultants
United States
Canada
Australia
Belgium
Brazil
Czech Republic
England
Finland
France
Germany
Guatemala
Holland
Hong Kong
Hungary
Italy
Japan
Poland
Spain
Sweden
Switzerland
Mouthpiece Components
GR Rims
GR Cups
GR Backbores
GR Blanks
GR Plating
Piccolo Mouthpiece Adapters
Flugelhorn Leadpipes
GR Mouthpieces School
Mouthpiece Parameters
Alpha Angle
Backbore
Beta Angle
Bore / Throat
Cup Diameter
Cup Volume
Gap / Blow Resistance
Plating / Plastic
Rims
Shank / Mass
Contact GR
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Cornet
Cornet