Austin Custom Brass MV 3L Trumpet Standard
Austin Custom Brass Trumpet Standard MV 3L, Mouthpiece for Trumpet, Standard series, Outer diameter: 27.23 mm (1.072""), Inner diameter: 16.87 mm (0.664""), Cup shape: Medium Shallow Bowl, Relative cup depth: 5, Shape of the backbore: S, Comparable to Bach Mt, Vernon 3D or Monette B4L, Silver-plated