BEST BRASS Trumpet Mouthpiece 1C -Kai- Gold-plated finish

Heavy weight and acoustic slits are designed to realize the best brass sound. They guarantee a solid sound, long reach, and a dignified "trumpet-like tone." Rim width: 5.823mm. Rim inner diameter: 17.15mm. Cup depth: medium. Throat diameter: 3.78mm. Backbore: TP-L.