The 2-1/8" ID x 1/2" Wall Self Seal Rubber Pipe Insulation with Overlap from Braxton Harris is designed for effective thermal insulation in plumbing and HVAC systems. This product features a self-sealing design with an overlap feature, ensuring a secure fit around pipes. Each carton contains 17 pieces, making it ideal for larger projects. The rubber material offers excellent thermal resistance, helping to minimize heat loss and improve energy efficiency. With a wall thickness of 1/2", this insulation complies with industry standards, making it suitable for various applications.