The 1-3/8 ID 1 Wall D Seal Pipe Insulation from Jones Stephens Corp is designed to provide excellent thermal insulation for pipes. This insulation features a 1-inch wall thickness and is perfect for reducing heat loss in HVAC systems. Made from high-quality materials, it ensures durability and long-lasting performance. The insulation is easy to install and fits standard 1-3/8 inch diameter pipes, making it a versatile choice for both residential and commercial applications. It helps in maintaining energy efficiency and reducing noise, complying with industry standards for insulation.