Detail 01
.886 inch (22.51 mm) cup diameter
The smallest inner rim in this line. It sits much closer to a trumpet player's setting than to a trombonist's.

Independent shopping perspective
Very small, shallow small-shank trombone mouthpiece. Built for the trumpet player doubling on trombone, or lead work on a small-bore horn.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
The smallest inner rim in this line. It sits much closer to a trumpet player's setting than to a trombonist's.
Detail 02
Less volume than the standard C cup. Brighter with more projection on top, noticeably thinner down low.
Detail 03
Spreads pressure and feels forgiving — the point of a doubler's piece, when your face isn't trained for trombone.
Detail 04
Standard for the small-shank line, so resistance stays consistent with other Schilke tenor pieces you might already own.
Detail 05
Fits small and medium bore tenor trombones. It will not seat properly in a large-shank receiver.
Detail 06
Slightly grippier on the lip than gold, and it shows wear at the rim contact point over years of playing.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Only if it takes a small shank — typical of small and medium bore tenors. Large-bore horns use a wider taper and this piece will sit loose.
That's exactly what the 40B is shaped around. The tiny rim and wide-rounded contour let a trumpet embouchure function without retraining.
Nearly the same diameter, .887 against .886. The 40 is the general small-diameter piece, good on bass trumpet and valve trombone. The 40B adds the shallow B cup and wide-rounded rim for doublers.
No — far too small. The 46D suits younger baritone and euphonium players, and the 51D or 52D are the larger euphonium choices in this line.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.