Phelps Dodge Alumilite® Aluminum THHN/THWN-2 wire is made from high-strength aluminum 8000 series alloy. known for its high conductivity, low weight, and durability, making it an excellent choice for applications where cost-effectiveness and performance are both important considerations. Additionally, aluminum THHN/THWN-2 wire is also flame retardant, making it a safe and reliable option for use in various environments.