Bach Commercial 7S
TrumpetIn Production
Precision Specifications
RIM DIAMETER16 mm
CUP DEPTHShallow
THROAT ∅3.66 mm
BACKBORE#56
SHANKstandard
CUP SHAPE—
Rim Width—
Rim Contourmodified flat
Throat Drill ##27
Materialbrass
Finishsilver-plate
Weightstandard
Recommended For
LeadCommercial
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Special Features
- Commercial Series
- Lead Free
- Modified Comfort Rim
Reference Notes
Bach Commercial 7S appears in the Trumpet catalog section with 16 mm rim, Shallow cup, 3.66 mm throat, #56 backbore, and standard shank. Database tags list it for Lead and Commercial use. Noted features include Commercial Series, Lead Free, and Modified Comfort Rim. Use these measurements as a comparison starting point: fit and response still depend on the player, dental structure, instrument receiver, and each manufacturer's measuring method.
Brand Deep Dive
Bach · BrassFit Science
Bach Mouthpiece Guide
Decode the Bach number–letter naming system, cup depth spectrum, and Big Three models.