Product Name: Full Face Flange Gasket
Material: EPDM Rubber
Size: 16 Inch (DN400, 400 mm)
Pressure: Class 150 LB (PN20)
Thickness: 4.5 mm
Face: Full Face
Source: https://www.landeepipefitting.com/full-face-flange-gasket-epdm-rubber-16-in-cl150-4-5-mm.html