Spiroflow Systems offers a line of flexible silos designed to store bulk solids and ingredients. Spiroflow flexible silos are made of polyester fabric supported on a steel frame. According to the company, the silos can store up to 7,000 cubed feet of dry, bulk material, up to 90,000 pounds. The silos are made to customer specification and can be connected to any Spiroflow flexible screw, aero mechanical, pneumatic or vacuum conveyor system to fill and empty the stored material.