Product Name: SS 304 Spiral Wound Gasket
Standard: ASME B16.20
Size: 20 Inch
Pressure: Class 150 LB
Thickness: 4.5 mm
Materials:
Inner Ring: SS 304
Outer Ring: SS 304
Winding: SS 304 with Flexible Graphite Filler
Source: https://www.landee.cn/ss-304-sw-gaskets-asme-b16-20-20-inch-cl150-lb-fg-filler.html