Product Name: DN300 Plate Flange, Flat Back
Type: Plate Flange
Design Standard: EN 1092-1 Type 01
Material: Q235B Carbon Steel
Size: DN300, 12 Inches
Pressure: PN40, Class 300 LB
Face: Type B (Raised Face)
Source: https://www.landeeflange.com/dn300-plate-flange-en-1092-1-type-01-carbon-steel-q235b.html