Detail 01
1.015 inch (25.78mm) cup diameter
Wide rim contact spreads lip load. More sound and easier low register, but endurance costs on long high passages.

Independent shopping perspective
Large-shank tenor trombone mouthpiece with a 1.015-inch bowl cup, slightly wider than the 51 for a broader sound. Built for large-bore orchestral and section work.

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
Wide rim contact spreads lip load. More sound and easier low register, but endurance costs on long high passages.
Detail 02
Mid-size opening. Keeps enough resistance that the horn still centers instead of feeling wide open.
Detail 03
Seats in large-bore tenor and bass receivers only. Small-bore slides need a different shank entirely.
Detail 04
Rounder cup favors dark, full tone over edge. The sound blends into a section rather than cutting across it.
Detail 05
Five thousandths sounds like nothing, but you feel it at the rim and hear it as extra width.
Detail 06
Tarnishes where fingers and lips touch. Wipe it down after playing and it stays clean.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Only if your slide takes a large shank — large-bore tenor and bass horns. Small-shank slides won't accept it.
Same bowl cup style, slightly larger diameter: 1.015 versus 1.010 inch. The extra width broadens the sound and opens up the low register.
Not really. The 46 is the size built for beginners. The 52's wider rim asks for a developed embouchure and students usually arrive here later.
It's small for full-time bass. The 57 handles tenor and bass doubling, and the 58 and 59 are the bass-focused sizes.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.