BOB REEVES Trumpet Mouthpiece 41/B x Backbore

BOB REEVES Trumpet Mouthpiece 41/B x Backbore, Inner Diameter: 16,272mm, semi-flat with a medium-sharp bite, deep cylindrical bowl (Like Bach 7B), the 41 rim is functionally similar to Bach 7C, 9D, 10 3/4 A,11A, 11C, and Schilke 13 rims. The physically largest backbore, the X is a popular choice for rotary trumpets and when a dark, warm sound is desired.