The 1-3/8" ID x 1/2" Wall Self Seal Rubber Pipe Insulation by Braxton Harris is designed for optimal thermal performance. This product comes in a pack of 20, making it ideal for large projects or multiple installations. The self-sealing feature allows for quick and easy application, ensuring a tight fit around pipes to minimize heat loss and condensation. Made from high-quality rubber, it provides excellent durability and moisture resistance. Perfect for HVAC systems, plumbing, and refrigeration, this insulation helps improve energy efficiency and reduce noise, making it a smart choice for any installation.