Best Brass BTB-2B mouthpiece for bass trombone, cup diameter O 27,25mm, cup depth: mildly deep, O 7,10mm throat, gold plated, fits for orchestra and big bands, similar bach 1-1/2G (slightly shallower)

Best Brass TB-L-7D mouthpiece for trombone, cup diameter O 25,00mm, cup depth: mildly shallow, O 6,40mm throat, large shank, gold plated, produces bright and clean-cut sound, similar bach 7C (shallower)

Best Brass TB-L-5A mouthpiece for trombone, cup diameter O 25,75mm, cup depth: deep, O 7,10mm throat, large shank, gold plated, produces rich and deep bass sound, similar conn reminton (slightly larger)