Product Name: Monel 400 Spiral Wound Gaskets
Materials:
Inner Ring & Winding Strip: Monel 400
Outer Ring: Carbon Steel, Zinc-Coated
Filler: Flexible Graphite
Size: 265 mm * 276 mm * 309 mm * 317 mm
Thickness: 4.5 mm
Ring Thickness: 3–3.2 mm
Source: https://www.landeepipefitting.com/monel-400-spiral-wound-gaskets-265-276-309-317-mm-fg-filler.html