Reeves Brass Trumpet Mouthpiece Underpart OnlyEach Bob Reeves Brass trumpet mouthpiece underpart is handcrafted and made to order using the same methods weve relied on for more than 50 years. These designs were shaped by the demands of leading studio, orchestral, and jazz artists, and built to the exacting standards that define our work. This product includes the underpart only and does not include a rim. Since Bob Reeves Brass mouthpieces use a screw rim system, we need to know which rim this