Retaining the old methods, many of which are solved with sandbags, each one rising water, many places have no time to prepare sandbags, sandbag lead to a result that is not in place, the water is not well in the block. Even if you can find sandbags, flood streets, a car would not be able to transport back to open sandbags. Retaining it is recommended to use a professional flap, sandbags even if we can get ready in time, it also requires manpower and resources when not in use, but also a lot of people need to pack up. However, using the flap on a lot simpler when not in use, as long as the flap away, or on the warehouse, or hung on the wall, a small footprint. Model: sd-dsb-SUS304A Specifications: High 200mm, thickness 38mm (can be customized according to the actual situation) Weight: 20kg Main features: sandbags and flood protection in conjunction, can achieve excellent waterproof effect price: value for money