In our factory, there are disc granulator, new type pelletizer, flat die pellet machine. The fertilizer granules made by double roller pelletizer are harder than these three kinds of pellet equipment. After granulation, you can get the quality fertilizer pellets with 15-20N. Generally speaking, the harder fertilizer granules, the longer storage time and easier transportation. In addition, this series of double roller pellet machine, the shape and size of ball socket on the roller sheet can be customized by your requirements. We can provide many shapes of ball socket, including the shape of pillow, semicircle, stick, pill, walnut, flat ball and square bar. By using the double roller pellet machine, you can get the fertilizer pellets of various shapes.