i see 98% pure iron, what more do you want
however if i were you before you purchased anything go to an autoparts store that does flywheel resurfacing, and ask to look at there machine, then see if they will let you have the "slduge" that is in it, that is the iron powder i am talking about, though it might not all be iron as different flywheels are different material, but once the stuff dries out could be sorted out fairly easy with a magnet.