... we choose the surface excellent anti-corrosive tube. Because the electrical heated tube scaling easily in liquid , we made the ... diameter: 8mm, 10mm5. Sealing style: Glass, RTV, epoxy resin6. Electrical performance; long-term placed, insulation value more than 10000mΩ, leakage ... --- yinamy9@gmail [dot] com and sikeqd@126 [dot] com electrical heated tube / electric heating tubes / electric heating tube