Product Name: ASME B16.20 Spiral Wound Gasket
Type: Spiral Wound Gasket
Design Standard: ASME B16.20
OD: 1026 mm
ID: 916 mm
Thickness: 4 mm
Materials: SS 316 (Inner & Outer Ring); Graphite (Filler)

Source: https://www.landeepipefitting.com/asme-b16-20-spiral-wound-gasket-ss-316-od-1026-mm-thk-4-mm.html