Motor vehicle exhaust spark arrester is suitable for explosive key fire units and warehouses garages, fields, forest, coal, liquefied petroleum chemical 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