Factory Supply Insulated Aluminum Round Winding Wire Per Kilo normally as a sample to buyer is used for transformers, inductors, motors, generators, dry type transformer, Cast Resin Transformers.Thermal class 155 and 180 mostly used for low voltage transformer, the class 200 and 220 used for high voltage transformer. Insulated Aluminum Round Winding Wire is made of aluminum conductor and UEW, QZ, QZY, EIW insulation materials. LP Industry manufactures the enameled wire in accordance with the IEC, NEMA standards with UL certificate.