The Greenlee PVC Heating Blanket is specifically designed for use with 3-1/2" and 4" PVC conduit, providing efficient and effective heating for pipes and tubes. With a power source of electric and a model tailored for PVC conduit applications, this heating blanket is a high-quality product made in the United States by the trusted brand Greenlee. This innovative tool offers a reliable solution for keeping PVC pipes and tubes in a manageable state for easier bending and shaping.