The Pro-Flex PFARCT-0125 Flak Jacket Arc-Resistant Corrugated Stainless Steel Tubing (CSST) is a flexible gas pipe designed for safe and efficient distribution of natural gas and propane in residential and commercial applications. The tubing is constructed from 304 stainless steel, compliant with ASTM A240/A240M-95A, and features a carbon-filled black polyethylene jacket. This "Flak Jacket" is arc-resistant, UV-resistant, and dissipates electricity, providing enhanced safety against lightning strikes. It has a nominal 1-inch inner diameter (1.070" actual ID, 1.355" OD with jacket) and is supplied in a 25-foot coil. The tubing is rated for a maximum operating pressure of 5 PSI (25 PSIG working pressure) and an operating temperature range of -20°F to 200°F (-28°C to 93°C). It complies with ANSI LC 1 / CSA 6.26 standards and is recognized by NFPA 54, ICC Codes (IFGC, IRC, IPC, IMC), and UPC for fuel gas piping syst