Model D Facing: Medium length, .041" tip Our "D" model mouthpiece is the original (ca. 1980) HITE interior design which is closely aligned with the traditional classic orchestral facing. The mouthpiece balances well with a Vandoren No. 4 or Vandoren V-12 No. 3-1/2 reed (or comparable). Compared to the "M41" model which has the identical facing, the "D" internal dimensions tend to produce a darker, rounder tonal character.