Schilke makes a wide variety and large number of stock mouthpieces, all of which are included the chart below. They are readily available and are remarkably inexpensive given their consistency and quality.
Model
mm
inches
Throat
Description
6A4a
15.99
.630
27
A shallow 'A" cup with cushion #4 rim for extreme high register work.
13A4a
16.76
.660
27
The shallow "A" cup, semi-flat #4 rim and tight "a" backbore creates an ideal lead mouthpiece.
14
17.02
.670
26
With a standard rim, cup and backbore, the 14 is an excellent choice for all around playing.
14A4
17.09
.673
27
Same as the 14A4a but with a standard "c" backbore which offers a more "open" feel.
14A4a
17.09
.673
27
One of the most popular mouthpieces, the 14A4a offers a shallow "A" cup, semi-flat #4 rim and tight "a" backbore allows a player a strong upper register without sacrificing tonal production.
14A4x
17.09
.673
27
Based on the popular 14A4a, this mouthpiece creates a very open blowing feel with the large "x" backbore. This backbore improves the ease of playing and opens up the sound of the piccolo trumpet. Also ideal for Eb soprano cornet.
15
17.12
.674
26
An excellent all-around mouthpiece which offers a free blowing, clear sound.
15A4
17.14
.675
27
Same as the 15A4a but with a larger "c" backbore for an open feel.
15C4
17.14
.675
26
This mouthpiece is similar to the #15 but with the #4 semi-flat rim for increased endurance.