Blind Flange, Flat Face, 4 in Nominal Pipe Size, Flanged x Blind, 9 in Flange Outside Diameter, 7/8 in Flange Thickness, 9 in Overall Length, Aluminum, Class Class 125, For Pipe Schedule 40, 125 psi Maximum Operating Pressure, 185 psi Max. Steam Pressure, 0 Degrees to 270 Degrees F, Number of Bolt Holes 8, 5/8 in Bolt Hole Diameter