R37 Octagonal Ring Joint Gasket, Size 4 inch, Pressure: CL900 LBS; Soft Iron , Standard ASME B16.20

R57 Octagonal Ring Joint Gasket, 1inch CL900,Soft Iron, Standard ASME B16.20

R38 Octagonal Ring Joint Gasket, Size 4 inch, Stainless Steel 316L , CL2500, Standard ASME B16.20

Standard Octagonal Ring Joint Gasket, Size R32, CL1500, RTJ, Stainless Steel 304, Standard ASME B16.2