JOHNS MANVILLE 693665 - PIPE INSULATION WALL TH 1/2 IN FOR 2 IN - PIPE INSULATION INSULATION BODY MATERIAL FIBERGLASS TYPE - PIPE INSULATION HINGED WITH SELF SEALING LAP WALL THICKNESS - INSULATION 1/2 IN INSULATION LENGTH 3 FT FITS PIPE SIZE 2 IN INSULATION NOMINAL I.D. 2 13/32 IN INSULATION TEMP RANGE 0 DEGREES F TO 850 DEGREES F INSULATION APPROX R VALUE 2.2 INSULATION APPROX K VALUE 0.23 COLOR WHITE STANDARDS ASTM C1136 ASTM C547 TYPE 1 ASTM C585 ASTM C795 MEA COMPLIANT MIL-I-24244C NRC 1.36 - EQUAL TO 45NE20