Definitely 1/0 AWG, unlike some other brands that claim to be, but are a size smaller. I couldnt accurately test the OFC claim because i dont have the equipment, but i think its very safe to say that it is, and very flexible, had no issue routing it through tight bends. The the wire casing is thick, and flexible as well. I also cant be for certain it is silver tinned like i believe the description said it was, but its definitely tinned in something that has a silver look, and i have no reason to believe its not. The wire was generously priced, I am greatful, as for NVX, it would be sick if they sold thick machined lugs to go with them, but i opted for those stamped copper lugs because machined lugs are a little overpriced in my opinion.