The 4-1/8" ID x 1/2" Wall Self Seal Pipe Insulation is designed to enhance energy efficiency in plumbing systems. This insulation fits standard pipes, providing a snug and effective barrier against heat loss and condensation. Each carton contains 5 pieces, making it a practical choice for smaller projects. The self-sealing feature simplifies installation, ensuring a tight fit without additional adhesives. Ideal for both residential and commercial applications, this product helps maintain optimal temperatures and reduce energy costs.