' Duct Insulation, Board, Fiberglass Material of Construction, Foil Scrim Kraft Jacket Material, Color Silver, Thickness 2 In., Approx. R Factor 9.1, 6 lbs. Density, 24 In. Width, 48 In. Length, Temp. Range -32 to 450 F Unfaced Side, -32 to 150 F Faced Side, Standards ASTM C612, Type IA, ASTM C612 TypeIB, ASTM C553 Type III, HH-I-558C, HH-I-558B, ASTM E-84, NRC 1.36, MIL-I-24244C, UL723, NFPA255, ASTM C795, ASTM C1136 '
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