Split Flange Kit, Flange Material Steel, Flange Material Finish Zinc-Plated, Flange SAE Code 61, Maximum Operating Pressure 3,000 psi, Nominal Flange Size 1/2 in, O-Ring Material Buna-N, Bolt Hole Center-to-Center Height 0.68 in, Bolt Hole Center-to-Center Width 1.5 in, Bolt Hole Size 0.34 in, Includes (2) Bolts, Both Flange Halves, O-Ring, Washers, Maximum Operating Temperature 250 Degrees F, Minimum Operating Temperature -40 Degrees F