The MDN Series horizontal ribbon mixers with opposite coils are the simple and essential proposals for obtaining quickly a homogeneous and repeatable batch mixture even with small quantities of product. The clean structure of the mixer composed of U-section trough makes it easy to in- stall in addition to the application of a complete series of accessories such as injec- tors of liquid additives, thermal exchange spaces for cooling or heating the mixed compound. The wide upper area allows the mixer to be loaded with the most varied systems (screws, pneumatic loaders, etc.).