Edit: Did a resistance test and rechecked the side and it's marked aluminum. Soft insulation I think; Conductor measures 2.3mm for 11 AWG. Not sure what the seller means when they say AWG doesn't stand for "US Wire Gauge" as the insulation is stamped "US 10 Gauge" which is inaccurate. 1.35 mm soft plastic insulation. Permissible insulation temperature 60C. When the black and red wires are separated, a black stripe is visible on the red wire. not a bad deal.
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