Protective fitting for decreasing Vibration amplitude and Grading shielding of Insulator string such as dampers spacers Spacer damper clamps are aluminum alloy. Dampers are elastomer. The other parts are hot-dip galvanized steel. 1.GB/T National Standard 2.Test before shipping 3.certification: ISO9001:2006 Spacers-dampers For six-Bundle Conductor(Type FJZ)