This general-purpose, 4 11/16 x 10-inch air line regulator has a 3/4-inch pipe and is made of die-cast zinc with a stainless steel strainer and renewable brass seat. Its diaphragm and disc are made with oil-resistant Buna-N. Its secondary pressure side gauge connections are 1/4" NPTF and are sealed with removable pipe plugs. It has a maximum supply pressure of 300 PSI with an operating range of zero to 250 PSI, and an operating temperature range of 40 Degrees F to 120 Degrees F.