od. SIA fiberglass silos feature two shells, one conical internally smooth and one cylindrical in shape, which allow all stored products to flow out without sticking and to be easily removed. Their modular design facilitates their logistics and consequently reduces transportation costs. There are three models: the SIA AN version characterized by a structure with short legs attached to a support ring in the center of the silo; the SIA GL version, on the other hand, consists of long legs attached to the silo via solid steel plates; and finally, the new SIA TQS model with a completely smooth inner surface and structure with a support ring for the short legs. All mentioned models are arranged for cochlear or pneumatic filling and product extraction by means of dampers, augers or automatic systems.