Dillon Roylance TDC Tuba Mouthpiece

Roylance TDCL- Light Weight
Rim diameter of 1.295" (32.89mm)
Throat of .323" (8.2mm)
Deep funnel cup.

Roylance TDCM- Medium Weight ( 10 grams heavier )
Rim diameter of 1.295" (32.89mm)
Throat of .323" (8.2mm)
Deep funnel cup.

Roylance TDCH- Heavy Weight ( 20 grams Heavier )
Rim diameter of 1.295" (32.89mm)
Throat of .323" (8.2mm)
Deep funnel cup.

European shank is larger and the taper begins with an outside diameter of .540” (13.71mm)
American shank is smaller and the taper begins with an outside diameter of .525” (13.33mm)