Compression Packing Seal Flexible Graphite Packing with Inconel Wire Square 1/2 In. Length 25 Ft Shiny Gray Color Ambient Temp Range -100 to 800 F Max Temp in Steam 1200 F Max Pressure for Pumps NR PSI Max Pressure for Valves 3500 PSI pH Range 1 to 14 For Use In Valves Application Recommended for Steam Valves