HAMMOND DESIGN Hammond Design Tuba Mouthpiece (30L)

30L: Cup inner diameter 32.9mm ・Throat diameter 8.2mm [U-cup Geib type] Similar rim size from other companies: Silky Geib 30XL: Cup inner diameter 32.9mm Throat diameter 8.2mm [V-cup Helberg type] Competitor product size with similar rim: Silky Hellberg