... hollow insulators, surge arresters, HV swithes, current transformers and power transformers Features: Fiberglass Winding Tube 1.Inner Diameter:14- ... 1000mm 2.Length: 10mm 3.High strength for application. 4.Test:SGS,National test5. ... 10m2.Test: SGS, other tests in National Labs3.Application: Power Transformer,Current Transformer,Hollow Insulators, Bushing, Surge Arrester, High- ...