Duct Insulation, 1-1/2In x 48In x 25 ft. Price For: Each Material of Construction: Fiberglass Standards: ASTM C-411, ASTM C-1104, ASTM C665, ASTM C-1338, ASTM E-84, UL723, NFPA 90A, CAN/ULC S102-1188, ASTM C1290, ASTM C553, ASTM C1136s Item: Duct Insulation Thickness: 1-1/2" Color: Silver Jacket Material: Foil Scrim Kraft Type: Wrap Width: 48" Temp. Range: -32 to 250 F Density: 1 lbs. Approx. R Value: 4.7 Length: 25 ft. Country of Origin (subject to change): United States