... rod 2.frp rod for composite insulator 3.Class F, Class H avaliable 4.good ... surface mat which are impregnated with epoxy resin by pultrusion. Insulator Core Rod Diameter: φ12, φ16, φ16.5, φ16 ... φ40, φ45,φ48, φ50, φ60, φ70, φ80,φ90,φ110 Insulator Core Rod SpecificationsDiameter (mm) AApprox weight(kg/m)16 0 ... 63605.93708.088010.55900.24 For more insulator core rod diameter,please contact us for details.