All silos from the FEERUM range can be lined with a flat metal sheet lining inside. It is recommended to use this type of lining in silos, in which difficult to discharge materials with a large angle of internal friction will be stored. It is a solution used in seed production to ensure maximum grain purity and homogeneity. They are also used to store such materials as feed, granulated products or oil cake. For fixing the flat sheet in the silo, the pan-head screws are used to eliminate the sloping and horizontal planes inside the silo and to minimize the possibility of suspension of the material stored in the tank.