Molded Parts for Insulating Cardboard of Transformers The series of products are manufactured by transformer insulating cardboard and high density T4 cardboard. Main products: end ring, bar stay, heal block, strap, setting circles, insulation cylinder, insulated ring, insulated slot, and etc. This product has good elongation and flatness. It has a good mechanical and electrical capability. It is used as solid dielectric material for transmission equipments such as transformers, reactors, and inductors. Demonstration