Schilke Trombone 40B Small

I bought my seasoned trombonist dad an Alto trombone which he loves. But it came with a 24.0mm inner diameter mouthpiece which he finds too large for the instrument. This Schilke 40B is the smallest mouthpiece I could find that fits the trombone shank and dad loves it, the upper register on Alto is much easier and the tone remains excellent even in the lower register of the instrument. My dad plays a large bore Bb/F trombone as his normal instrument so the Alto is considerably smaller.