Austin Custom Brass Trumpet Standard 3DS
Austin Custom Brass Trumpet Standard 3DS, Trumpet Mouthpiece, Standard Series, Outer diameter: 27.08 mm (1.066""), Inner diameter: 16.51 mm (0.65""), Cup shape: Medium Shallow Bowl, Cup depth: 4.5, Shape of the backbore: S, Silver-plated, Similar to the Monette BLM, GR 65MS/S, or Pickett 5D