Duct Liner Board; Type Round; Insulation Thickness 1 Inch; Roll/Sheet Dimensions 48 Inch Width x 120 Inch Length; Material Fiber Glass; Density 64 Kilogram per Cubic Meter; Maximum Temperature Rating 250 Deg F; Application HVAC; Applicable Standard ASTM E84/C1071, UL 723, NFPA 90A/90B/255, SMACNA, NAIMA; Insulation Type R4.3; Metal Duct Inner Diameter 8 to 16 Inch; Finished Inner Diameter 6 to 14 Inch; Finish Acrylic Polymer