Product Name: PTFE Filler Spiral Wound Gasket
Type: Spiral Wound Gasket
Standard: ASME B16.20
Size: 22 Inch
Pressure Rating: Class 150 LB
Materials:
Outer Ring: Carbon Steel (CS)
Filler: PTFE
Inner Ring: SS 316

Source: https://www.landee.cn/ptfe-filled-spiral-wound-gasket-cs-or-ss-316-ir-22-inches.html