Jose Chafer Mompo - TrumpetJCMInner Diameter: 0. 650" Outer Diameter: 1. 080"Cup: Medium Deep BowlBore: . 27 (Jose prefers 24)Preferred Backbore (not included): 8* (Jose uses a 24 throat)"I first met Terry before the eleventh CIMVO conference in Spain. From the first time I tried his mouthpieces, I could feel the many advantages his products could offer. I immediately noticed a greater resonance in my sound, faster response, improved range, and better projection. All of these