Thomann Tuba 25 Nut Wood, Wooden Mouthpiece for Tuba, Size: 25, Made of walnut wood, All-round mouthpiece, Inner cup diametre: 30.30 mm, Outer cup diametre: 46.70 mm, Small cup, Recommended for beginners, Bore: 8.2 mm, Total length: 99.00 mm, Elaborate 5-coat paint finish, Inner shaft oiled several times, Extremely durable, Made in Austria