Munnstykke Trompet Yamaha GP 14B4

Yamaha TR-14B4-GP Mouthpiece for Trumpet
GP Custom Series - Gold-plated Rim

Overview
GP Series has been created especially for professionals who require superior quality from their mouthpiece.
The GP Series features an innovative shape and extra-heavy gold-plate finish for players who prefer a focused, concentrated tonal core.

Specs
Characteristics: Relatively large rim diameter and shallow cup. Outstanding overall balance for all musical genres.
Model no: TR-14B4-GP 
Rim Inner Diameter (mm): 16.85
Throat (mm): 3.65