The same digital technology used for trumpet mouthpieces is now available for trombone. You can now use the same rim for all your playing needs. Up to 3 different cup depths are available to help you tailor your sound to the setting. The heavier Curry Blank requires a slightly larger throat and backbore than standard. The extra mass allows for a denser, richer tone and better projection.

S cups are slightly shallower than Bach C cups and produce a sparkling, compact sound. Good for commercial and big band lead work.
C cups are based on an old New York design. Excellent for all-around work.
M cups are slightly deeper and more conical than the C cups. You can attain a deeper, richer tone when it's required.
G cups are the “standard” for symphonic tenor. More cup-shaped than conical, you can achieve a variety of tone colors with this cup.
D cups are designed for orchestral tenor and bass trombone where a dark, powerful tone is preferred. D cups also can be used with great success on the euphonium. Diameters are equivalent to industry standards.