Startone PTB-20 Bb/F- Trombone Orange, Bb/F Quart trombone, Material: ABS plastic, Bore diameter: 13.90 mm, Diameter of bell: 219 mm, Weight: 860 g, Colour: Orange, Includes ABS mouthpiece and soft-bag@+*Note:* Mouthpiece colours may vary from mouthpiece to mouthpiece.@+@+