... B16.21,DIN127 ,JIS Stainless steel ring gasketType: Spiral wound gasket, oval RTJ, Octagonal RTJ, Lens gasket, corrugated gasket, Camprofil gasket, Double ... ,C,D four styles 2)Material:tinplate/304/316+graphite 3)Used in pump,chemical,etc. 1. Specification: 2.5mm ~ 80mm ... . Specification: No 4-3/2 Standard: ANSI / ASME B 18.21.1 3. Specification: 1/8’’~3/2’’ Standard: BS 1802 4. Specification: 3mm~48mm ...