This 138-foot semi-slit pipe insulation features a 1-5/8" inner diameter and a 3/8" wall thickness, providing effective thermal insulation for various piping applications. Constructed from high-quality materials, it helps reduce heat loss and prevent condensation, making it ideal for HVAC and plumbing systems. The semi-slit design allows for easy installation over existing pipes, ensuring a snug fit. This insulation meets industry standards, making it a reliable choice for both residential and commercial projects.