The Jones Stephens Self-Seal Black Rubber Insulation Tube measures 4-1/8 inches in inner diameter and features a 2-inch wall thickness, making it ideal for thermal insulation applications. This 12-foot tube is designed for easy installation with its self-sealing feature, ensuring a tight fit that minimizes heat loss. Constructed from high-quality rubber, it provides excellent durability and resistance to moisture and temperature fluctuations. This insulation tube is perfect for HVAC systems, plumbing, and other applications requiring reliable thermal protection. It meets industry standards for insulation materials, ensuring compliance and performance.