Fire cap is mounted on the rear of a vehicle exhaust pipe, allowing exhaust gas flow through and prevent the flames and fire safety, fire retardant devices Mars ejected within the exhaust stream. Is to protect the state's key fire units and all transport vehicles in explosive areas must be equipped with fire safety critical product. Suitable for explosive key fire units and warehouses and freight yard, oil, forest, coal, liquefied petrochemical plants, paper mills, airports and other fire ban area. The product is easy to install and easy, just the opening end of the match the specifications of the product caliber with bail is set in the corresponding vehicle exhaust pipe, and then tighten the clamps on both sides of the clamping nut. http://www.shanghaihuxiao.com/qichefanghuozhao.htm