... property composite core rod Core Rod is made from fiberglass roving.continuous strand mat and 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 0.43170 ...