Usually the U case's length and width are invariable; the height is increased as an invariable digit 44.5mm. The U case can be classified into two types, one is monolayer and the other is double deck. The size of the first one is 50 x 53cm and the later one is 50 x 60mm. We can add the mixer or other case sometimes. Also, you can custom it. And we can design and manufacture flight case according to your demands. Outer packing: carton producing area:China payment:T/T