Product Name: Carbon Steel Blind Flanges
Size: 6 Inch, DN150, 150 mm
Pressure: Class 600 LB, PN100
Design Standard: ASME B16.5
Material: Forged Carbon Steel ASTM A105
Face: Raised Face
Surface Treatment: Black Paint

Source: https://www.landeeflange.com/carbon-steel-blind-flanges-a105-6-inch-cl600-raised-face.html