Glory Brass GTU3 3 key B Flat Tuba, Gold finish, with Mouthpiece,Case and Glove,Click to check more choice Brass body with Stainless Steel Pistons, Gold finish Bore Size 16.8 mm, Bell DIA 370mm Before delivery, our Tuba are tested by professional quality inspector again to verify that they meet our standards ncludes: silver plated mouthpiece, pro-deluxe hard case and a pair of gloves