The Frost King SP55/6 Duct Insulation is a high-quality fiberglass insulation designed for use in ducts and pipes. With a thickness of 2 inches and a length of 15 feet, this insulation offers excellent insulation value and density. The product comes in a convenient 2-pack bundle, making it easy to cover multiple surfaces. The insulation is suitable for temperatures ranging from 35 to 250 degrees Fahrenheit, and it is compliant with various standards such as ASTM C 1136. This durable and reliable product is ideal for industrial and commercial applications looking to improve energy efficiency and reduce heat loss.