This ISO 228.1-certified, class 150, 1 1/4-inch union has an FBSPP connection type. It is used in air, natural gas, oil, potable water, and steam-based applications and is made of 316 stainless steel for excellent corrosion resistance. This product has a maximum operating pressure of 150 PSI with a temperature range of -30 Degrees F to 320 Degrees F.