... ,thimbles,mutual inductors,insulator,etc 3.ISO9001:2000 Epoxy fiberglass rod:This product can be used as the wick of insulator ... glue and permitted.It should bear the machining of sawing,drawing,milling,planning and lathe thrading.2.Norminal diameter and mistake ... diffusion test KV 128.Leakage current mA <1 Epoxy fiberglass rod