BEST BRASS Trumpet Mouthpiece 9C -Kai- Gold-plated finish

``Heavy weight'' and ``acoustic slit'' are ingenuity to embody the best brass sound. It promises a profound sound, long range, and a dignified ``trumpet-like tone.'' Rim width: 5.823mm. Rim inner diameter: 15.95mm. Cup Depth: Moderate. Throat diameter: 3.78mm. Backbore: TP-M.