1.25 GW Helios Trumpet Mouthpiece Rim Diameter 17.09mm, .673 inches .182 Power without compromise — Effortless

Power without compromise — Effortless big sound for orchestral anchors

more resistant materials that project clearer

professional orchestral and wind ensemble musicians

and the projection needed to cut through brass sections

The cup is shallower than the F Tuba piece

1.25 GW Helios Trumpet Mouthpiece Rim Diameter 17.09mm, .673 inches .182 Power without compromise — EffortlessThe Popular Large Rim Bach 1 1 4 Style. . 673" 17. 09mm inner rim diameter. This timeless rim diameter remains a favorite among advanced trumpeters who crave extra comfort, freedom, and tonal authority without sacrificing control. Modeled after the classic Bach 1 1 4, it provides a slightly more spacious feel than smaller rims, allowing for effortless airflow, reduced fatigue, and a broader, more resonant sound ideal for players with strong embouchure