... electrical insulation, type 6020, transparent film. Width:1000mm, thickness: 0.04,0.05,0.075,0. ... 10, 0.125 et Electrical insulation polyester film is manufactured by polyethylene terephthalate to be extruded and stretched ... insulation, interturn insulation, and coil insulation with good mechanical and electric property. It is transparent film and thermal grade B class.