Round angel resonance is made of stainless steel and galvanized. Stainless steel is as smooth as a mirror, has excellent workmanship, and has a great sense of weight in the hands. In addition, it is not easy to deform and leave fingerprints, and it is super corrosion resistant, so the price is higher, and the picture is between 150 and 250 yuan. In addition, the tail throat of galvanized raw materials, to put it bluntly, is coated with a layer of zinc film outside the iron, but after a long time, the zinc film falls off and will still be corroded, so the price is also relatively cheap, more than 50 yuan each. In terms of specifications, it is produced according to the size standards of various automobile exhaust pipes, so there are many specifications that can be selected for the owners who drive different vehicles. Square mouth, square mouth and other shapes.