Product Name: ASME B16.20 SW Gasket
Type: Spiral Wound Gasket (SWG)
Standard: ASME B16.20
Size: 8 Inch
Pressure Class: Class 300 LB
Thickness: 4.5 mm
Inner Ring Material: SS 316
Outer Ring Material: SS 316
Filler Material: Graphite
Source: https://www.landee.cn/asme-b16-20-sw-gasket-ss-316-ir-or-8-inch-cl300-4-5-mm.html