... , magnetic heads, instruments,speakers e)Chemically resistant.Hifar Copper Enamelled Wire1,Coating: polyurethane; polyesterimide;2,Temperature classification: ... 90mm, 4,130 class direct welding polyurethane round copper enamelled wire. Perfect performance on direct welding---weld it ... make it easy to distinguish every wire in different function. Moisture resistant. 2012 New Copper Enamelled Wires