Product Name: ASME B16.21 Flat Gasket
Design Standard: ASME B16.21
Material: KLINGERSIL C4430
Size: 16 Inch, DN400
Pressure Rating: Class 150 LB, PN20
Thickness: 2 mm
Source: https://www.landeepipefitting.com/asme-b16-21-flat-gaskets-klingersil-c4430-16-inch-150-lb.html