The Master Flow 8 In. x 5 ft. R-6 Ductwork Insulation Sleeve is a high-quality radiant barrier made of fiberglass, providing an R-8 insulation value. This silver-colored sleeve, with a coverage of 5 ft and a width of 8 inches, is suitable for ductwork and comes in a roll packaging. Manufactured in the United States, this unit is guaranteed with a 1-month warranty and free shipping for added convenience. Perfect for insulation needs in commercial and industrial settings, this product from Master Flow is a reliable choice for keeping spaces cool.