1.25 GW Helios Trumpet Mouthpiece Rim Diameter 17.09mm, .673 inches .182 Solid & secure — Precise

Solid & secure — Precise slotting and control for demanding parts and long sessions

Power without compromise — Effortless big sound for orchestral anchors

and freedom their artistry deserves

and zero strain — ideal for long gigs

1.25 GW Helios Trumpet Mouthpiece Rim Diameter 17.09mm, .673 inches .182 Solid & secure — PreciseThe 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