Schedule 40 Weld Neck Flange, Raised Face, 4 in Nominal Pipe Size, Flanged x Weld Neck, 10 in Flange Outside Diameter, 1 1/4 in Flange Thickness, 3 3/8 in Overall Length, Stainless Steel, 316/316L, Class Class 300, 720 psi Maximum Operating Pressure, 300 psi Max. Steam Pressure, Number of Bolt Holes 8, 7 1/2 in Bolt Circle Diameter, 3/4 in Bolt Hole Diameter