Fiberglass Lead Insulation Wire has excellent thermal stability and high voltage properties combined with small size due to low wall thickness, superb thermal resistance and low production costs makes it the bestinsulation option in applications where high thermal insulation is required at mains voltages. FPC Fibre glass cables are closely braided from 'E' grade low alkali type fibreglass yarn, impregnated with synthethic varnishes as per temperature & insulation class requirement.