What's not to know???..... Solid copper, flexible and It's CHEAPER than most likely any quality 1/0 you're gonna buy.ehh idk bout welding wire. and yea turd I got 4 15's AA chaos and a 250 amp DC power alt, cdt comps, kicker 850.4, RD D9 amp and 3 C&D 135AH batts, optima upfront. all in a blowthrough 4th order should be loud at least i hope