Insulation Sheets Overall Width 24 in Overall Length 4 ft Thickness 2 in Material Fiberglass Jacket Material All Service Jacket Insulation Value 8.7 Insulation Density 3 lb Product Type Duct Insulation Color White Maximum Temperature Rating 450 Degrees F Minimum Temperature Rating -32 Degrees F Standards ASTM C1136 ASTM C553 Type III ASTM C612 ASTM C612 TypeIB ASTM C795 ASTM E-84 HH-I-558B HH-I-558C MIL-I-24244C NFPA255 NRC 1.36 Type IA UL723