The main body of this product is made of stainless steel, including stainless steel hose (ie bellows) and installation components. It is used to connect the sprinkler head and the main pipe in the automatic sprinkler system, replacing the traditional hard pipe connection. Compared with the traditional hard pipe, the fire hose installation has eight advantages, such as safety and durability, accurate tracking, convenient secondary installation, quick installation, cross-operation, silent construction, reduced labor costs, and earthquake resistance. It will become a new solution for the terminal installation of the future automatic sprinkler fire extinguishing system. This product has advanced technology and excellent performance: its tube embryo adopts four-time molding technology, which makes it have the smallest bending radius (175mm) in the world for FM certification, and the fatigue resistance test reaches 65,000 times, which exceeds the FM certification standard by 30%. The finished product welding adopts four-in-one TIG fully automatic welding, with a full and smooth welding surface and uniform penetration depth; the product has undergone three 100% airtightness tests, and the factory quality is worry-free.