Changsha Powerful Industrial Co.,Ltd ,as a leading manufacturer and supplier of a wide range of Electrical Insulation materials for transformers,motors and generators.Our main products including Insulation paper,Transformer Pressboard,Flexible composite insulation paper(DMD,NMN,NHN&AMA),Insulation Film,Insulation tape,Insulation sleeving and etc that are used in electrical appliances and for cable,transformer,Motor,electrical device industry.With top-class products & excellent service, we have developed and manufactured transformer boards & insulating materials for almost 30 years.