... filling 3,ISO9001:2008certified 4 Hight quanlity good se metal Corrugated gasket Spiral wound gasketSpecificationQS 3050 Spiral wound gasket is formed ... . It can be used as the static sealing element of pipe, valve, pump, thermal exchange, condensing tower, plain hole and man ... inner&outer ringsColor cord as ASME B16.20 on request corrugated metal graphite gasket