Musical Instrument Accessories
Bach 351 7EW Mundstück für Trompete
Bach 351 7EW, Mouthpiece for Trumpet, Flat cup, Cup diameter: 16.20 mm, Slightly thicker rim with slope towards the outside, Backbore: 117, Silver-plated, For brass players who exert high pressure
https://www.bizrate.co.uk/musicalinstrumentaccessories/bach-351-7ew-mundst%C3%BCck-f%C3%BCr-oid565589382.html
