DanG, yeah, I was thinking of a 3 conductor cable containing 4/0. The listing above is single conductor. They don't say if it's aluminum, copper or steel.
I have welding cable that is hi-flex steel. Fatter than copper but melts at a higher temp. I wouldn't trust Al for welding cable even with antiOx paste. I don't know how the power company manages to use Al for power transmission unless it's a special alloy.