Detail 01
30.5mm cup diameter
Smaller rim circle than the 1, 2 or 3 sizes, so less lip to control and endurance comes easier.

Independent shopping perspective
Denis Wick 4L tuba mouthpiece: 30.5mm cup, 8.27mm throat, small shank. Aimed at younger or developing players who need projection without heavy air demands.

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
Smaller rim circle than the 1, 2 or 3 sizes, so less lip to control and endurance comes easier.
Detail 02
Mid-range bore for this line. Builds tone without demanding the air supply the 8.78mm throats want.
Detail 03
Fits small-shank receivers only. Check the leadpipe first; an adapter changes how the horn responds.
Detail 04
Cup and backbore are matched for output at moderate air, which suits an embouchure still developing.
Detail 05
Wipes clean quickly. Polish rather than scrub — abrasives wear the plating fastest right at the rim.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It is a small-shank mouthpiece and seats in small-shank receivers. If your leadpipe takes a large shank, this size will not fit properly.
Both use the 30.5mm cup and 8.27mm throat. The 4 is described for clear tone and articulation, the 4L for projection with less effort.
Yes. The narrower cup and moderate throat make response and endurance easier than the 1, 2 or 3 sizes in the same series.
Not much. This is one of the smaller cups here. The 3L, with a 31.25mm cup and 8.78mm throat, moves far more air down low.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.