... Certification: ISO 9001, UL, RoHS, Reach, SGS 2012 China best soldering enamel copper wire for electrical ... . UL approved, file number:E250244Application fieldSuitable for electronic components, instrumentation winding, transformers, telecommunication equipments, motor, ... Conductor Diameter, Film Thickness, Conductor Resistance, Elongation, Spring Back, Mandrel Winding, Sudden Jerk, Cut Through, ...