Pellets are cylindrical shapes made from dry material and are used for several purposes. With these pelletpresses you can make your own pellets for- animal feeding: horse feed, hay, dog feeding- fuel from biomass: sawdust, paperscrap, straw- ground cover / consolidation: compost, fertilizer Aperture of grinding disc: 2/3/4/6/8mm (4mm is sent by default. For other sizes, please consult the seller.) The machine needs to use a pure copper motorModel 125 is suitable for 3kw motorModel 150 is suitable for 4kw motor.syi