Best Brass BTB-3B mouthpiece for bass trombone, cup diameter O 26,75mm, cup depth: mildly deep, O 7,10mm throat, gold plated, similar bach 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-5B mouthpiece for trombone, cup diameter O 25,75mm, cup depth: mildly deep, O 7,10mm throat, large shank, gold plated, similar bach 5G (slightly larger)