●Free size: Bb, C, F, Eb/ Most of Tuba (1300*850*480 mm) ●420 Denier High density fabric with Reflective Insulation lining ●Strong rivet for the backpack and shoulder strap ●Non-slip material to protect the bottom and Waterproof front pocket ●Model Tuba: 5/4 CC Tuba, Bell 18.9", Height 39"