Thomann wooden mouthpiece for trumpet, size 1-1/2C, made of olive wood, allround mouthpiece, boiler - inner diameter: 17,00 mm = 0.67 Inches, boiler - outside diameter: 27,20 mm = 1.07 Inches, medium flat cup, medium wide edge, drilling: 3,7 mm running = 0.15 Inches, total length: 87 mm = 3.43 Inches, brilliant sound, elaborate 5-layer lacquering, shaft oiled several times on the inside, extreme longevity, made in Austria