Product Name: ASME B16.20 Spiral Wound Gaskets
Type: Spiral Wound Gasket
Standard: ASME B16.20
Inner Ring Material: SS 304
Outer Ring Material: Carbon Steel
Filler Material: Graphite
Size: 24 Inch
Pressure Rating: Class 300 LB
Thickness: 4.5 mm

Source: https://www.landee.cn/asme-b16-20-sw-gaskets-ss-304-ir-cs-or-24-inches-300-lb.html