Split Flange Kit Flange Material Steel Flange Material Finish Zinc-Plated Flange SAE Code 61 Maximum Operating Pressure 3 000 psi Nominal Flange Size 1 in O-Ring Material Buna-N Bolt Hole Center-to-Center Height 1.04 in Bolt Hole Center-to-Center Width 2.06 in Bolt Hole Size 0.556 in Includes (2) Bolts Both Flange Halves O-Ring Washers Maximum Operating Temperature 250 Degrees F Minimum Operating Temperature -40 Degrees F