... ECR-fiberglass (FRP/GRP) 2. epoxy resin, With high mechanical strength FRP insulator is made of fiberglass or ECR- ... fiberglass (FRP/GRP) and epoxy resin, With high ... , used for silicone rubber composite insulator, pocelain insulator, composite hollow insulator, Pillar insulator, cross arm insulator, electric railway insulators, HV switch ...