1. The stainless steel tube is stranded by double or three layers of aluminum clad steel wires(ACS) or mix ACS wires and aluminum alloy wires.

2. The central Al-covered steel tube is surrounded by single or double layers of aluminum clad steel wires (ACS) or mix ACS wires and aluminum alloy wires. Al-covered stainles steel tube design increases the cross section of AL, to reach a better fault current and lightning resistance performance. Appl to the transmission line which requires small diameter and large fault current.

3. The aluminum tube is surrounded by single or double layers of aluminum clad steel wires(ACS) or mix ACS wires and aluminum alloy wires. Good anti-corrosion perforanance. Material and structure are uniform, good resistance to vibration fatigue.