RS5001 Spiral wound gasket is formed of V-shaped or W-shape stainless steel stripe and soft nonmetallic packing or the material of flexible graphite asbestos, nonasbestos, PTFE etc by means of piled. it can use inner ring and outer ring as different material such as carbon steel , stainless steel 304, 316, 316L etc . The static sealing element of pipe, valve, pump, thermal exchange, condensing motorcycle, auto vent-pipe, tower, plain hole and hole of flange, etc.