The Pierobon C is the signature mouthpiece of Marco Pierobon of the Gomalan Brass. It is a Standard Brand version of a Reeves 43.5CX with a wide Gabriel style rim. The rim has an ID of .662 and an OD of 1.12. The lateral dip is 15/1000". This is the same rim found on the Pierobon Lead and Pierobon Flugel. This mouthpiece has our new Double Oval Cup (DOC). The diameter of the rim and cup in the vertical dimension is 10/1000 of an inch larger than it is from side to side. This means that the oval shape of the Wedge rim is continued down to the base of the cup where it joins the throat. The DOC design, found only in Wedge mouthpieces, provides the added efficiency of a smaller mouthpiece with the big sound, clear attacks, and flexibility of the larger mouthpiece. Wedge plastic mouthpieces are machined from black Delrin just like our brass and stainless steel models. They have all the advantages of a metal Wedge mouthpiece, the main difference being that they play with a darker sound. Slotting and response is excellent. This top can be used with any Wedge, Warburton, or similar backbore with a matching throat size. The metal backbore makes the mouthpiece sound slightly brighter than the all plastic model.