The temperature resistance index of Class 155 Reasonable Price Glass Fiber Covered Aluminum Round Wire has three grades: 130, 155, and 180, and the insulation thickness generally has four grades of 20, 30, 40, and 50. This product is widely used in windings of transformers, electromagnets, welding machines or other similar electrical equipment products. Electrician bare aluminum wire produced by extrusion process is the most ideal material for producing glass fiber coated aluminum wire.