This heavy-duty TPU spring power cable is a brand-new spare part for semi-trailer and commercial vehicle connection. Made of high toughness TPU outer layer and pure copper inner core, it features wear resistance, waterproofing and anti-aging ability. The retractable spiral structure avoids winding and effectively adapts to trailer moving and towing distance changes. It provides stable and safe power signal transmission, ideal for replacement and assembly of semi trailer electrical system components.