Function: 1) Exhaust Flexible pipe, automobile exhaust system component 2) Installed between engine and muffler,suitable for wide range of the tail pipe link. 3) Used to decrease engine noise and vibration 4) Absorbs muffler pipe thermal expansion 5) Compensates for exhaust converter misalignment 6) Reduces air pollution Material : 1)Material:SS201 ,SS202 , ,single layer and double layer are available 2)Ourter braid and the inner braid is the SS201 ,SS202 . material 3)The braid is 12 wires and collar is stainless steel ,alloy steel.