Aluminum-mylar is a composite material consisting of a layer of aluminum foil and a layer of mylar film. It is commonly used as shielding in cables to prevent interference from external electromagnetic fields.
Copper-clad aluminum wire (CCA) is a type of wire that consists of an aluminum core with a copper coating. It is often used as a cost-effective alternative to pure copper wire because it is less expensive and lighter in weight. However, it has lower conductivity than pure copper and may not be suitable for some high-performance applications.