Schilke Trumpet Mouthpieces Model Diameter Throat Description Millim. Inches Symphony Series #1 Rim Comparison=Schilke 19/20 or 1C Faddis 28 .141" An extra large "Heavyweight" trumpet mouthpiece, this models design is based on the mouthpiece used by legendary jazz artist, musician, conductor, composer and educator Jon Faddis for his Schilke S42L Faddis Model set-up. JFXL inner rim equivalent = Schilke 11 with an extra shallow cup. M1 24 .1520" Small cup diameter with shallow "A" cup and semi-flat rim offers comfort and resistance in the upper register. M1C 27 .1440" Standard bowl shape "C" cup with tighter 27 throat and Schilke C backbore. A wonderful option for the player that desires a balanced, compact feel with more resistance than the M1 model. M1D 24 .1520" Standard bowl cup with 24 throat and TIGHTER Schmidt backbore. Very good option for either Bb or Eb trumpet playing. M1* 24 .1520" The "*" models share same rim and cup as the "M" and "MD" models. They have a LARGER Schmidt backbore with a shorter throat that creates less resistance and a more open feel. D1 24 .1520" Deeper bowl shape cup that still provides feedback for control. The "D" cups have a smaller version of the Schmidt backbore, tighter to balance the deeper cup. D1 20 .1610" The "F" models offer a deep "V" shape cup that provides darker, warmer, more conical color allowing one to project at full capacity but maintain a soft mellow sound. These models utilize a shorter shank to compensate for cup volume plus a larger throat size & backbore taper. Symphony Series #150 Rim Comparison=Schilke 18 or 1.25C M150 24 .1520" Slightly smaller "150" Rim diameter, standard bowl shape "C" cup, 24 throat and Schmidt backbore. M150C 27 .1440" Slightly smaller "150" Rim diameter, standard bowl shape "C" cup with tighter 27 throat and Schilke C backbore. M150D 24 .1520" Slightly smaller "150" Rim diameter, standard bowl shape "C" cup, 24 throat and TIGHTER Schmidt backbore. M150* 24 .1520" LARGER Schmidt backbore with a shorter throat in a 150 rim diameter. More open feel. D150 24 .1520" Deeper bowl shape cup in "150" rim diameter. F150 20 .1610" "F" cup model with shorter shank in "150" diameter. Offers a dark, mellow sound. Symphony Series #2 Rim Comparison=Schilke 16C4/17 or 1.5C M2 24 .1510" Slightly smaller "2" Rim diameter, standard bowl shape "C" cup, 24 throat and Schmidt backbore. M2C 27 .1440" Slightly smaller '2' Rim diameter, standard bowl shape "C" cup with tighter 27 throat and Schilke C backbore. M2D 24 .1510" Slightly smaller '2' Rim diameter, standard bowl shape "C" cup, 24 throat and TIGHTER Schmidt backbore. M2* 24 .1510" LARGER Schmidt backbore with a shorter throat in a 2 rim diameter. More open feel. M2X 24 .1510" This model has the rim, throat, and backbore of a M2 but the cup shape of the M1 for slightly more cup volume. D2 24 .1510" Deeper bowl shape cup in '2' rim diameter. F2 20 .1610" "F" cup model with shorter shank in '2' diameter. Offers a dark, mellow sound. Symphony Series #3 Rim Comparison=Schilke 15/14 or 3C M3 24 .1520" Slightly smaller '3' Rim diameter, standard bowl shape "C" cup, 24 throat and Schmidt backbore. M3C 27 .1440" Slightly smaller '3' Rim diameter, standard bowl shape "C" cup with tighter 27 throat and Schilke C backbore. M3D 24 .1520" Slightly smaller '3' Rim diameter, standard bowl shape "C" cup, 24 throat and TIGHTER Schmidt backbore. M3* 24 .1520" LARGER Schmidt backbore with a shorter throat in a 3 rim diameter. More open feel. D3 24 .1520" Deeper bowl shape cup in '3' rim diameter. D3 20 .1610" "F" cup model with shorter shank in '3' diameter. Offers a dark, mellow sound. Symphony Series #3 Rim Comparison=Schilke 15/14 or 3C M5C 27 .1440" Slightly smaller '5' Rim diameter, standard bowl shape "C" cup with tighter 27 throat and Schilke C backbore.