Mr. Bass - The Bob Reeves - Brass Ark Commercial Bass Trombone MouthpieceHandcrafted commercial bass trombone mouthpiece in silver plate featuring a 1 1 2G, 27. 15mm rim, and "GR" cup. Designed with the commercial bass trombonist in mind, this mouthpiece was inspired by a vintage piece made for "Mr Bass Trombone" in the 1960s. Ideal for players looking for a 1 1 2G sized mouthpiece with just a bit more room in the rim, punchy low end and singing middle and upper registers. Available as one piece solid mouthpiece or as a