Compression Packing Seal Carbon Packing with Flexible Graphite Core and Aramid Corners Square 1/4 In. Length 10 Ft Dull Black Color Ambient Temp Range -400 to 650 F Max Temp in Steam NR F Max Pressure for Pumps 4000 PSI Max Pressure for Valves NR PSI Max Shaft Speed 3500 Ft/Min pH Range 2 to 13 For Use In Pumps Application Ideal for Stock Pumps in Paper Mills or Other Similar Applications