Super Duplex Stainless Steel ASTM A182 F53 Weld Neck Flange, manufactured by a reputable supplier. This flange is made of SS 2507, forged steel, with a diameter of 4 inches, rated at Class 300 LB according to ANSI B16.5 standards. Featuring SCH 40 thickness and a raised face design, it ensures reliable performance in demanding applications.