Nipple, Application Air, Natural Gas, Non-Potable Water, Propane, Steam, Fitting Compatibility Schedule 40, Gravity Flow No, Inside Diameter 4 in, Material Stainless Steel, Material Grade 304, Maximum Operating Pressure 878 psi, Maximum Operating Temperature 650 Degrees F, Metal Pipe Construction Welded, Minimum Operating Temperature -20 Degrees F, Nominal Pipe Size 4 in, Outside Diameter 4 1/2 in, Overall Length 4 in, Pipe Weld Type Continuous Weld, Schedule Schedule 40