The 48 In x 35 Ft x 1-1/2 Thk Roll Duct Liner from Jones Stephens Corp is designed for effective insulation in HVAC systems. This 140 square foot roll provides excellent thermal performance, helping to maintain energy efficiency. Made from high-quality materials, it features a durable gray finish that enhances its longevity. The liner is easy to install and is compliant with industry standards, making it suitable for both residential and commercial applications. Its thickness ensures optimal sound absorption and temperature control.