Got my first big load today 130# of WW at a junk yard for .15 a pound. Previously nothing more than a handfell or so. Real clean some stick ons but almost no valve stems. They also had some stuff that looked like wire insulation. Pipes about 1 1/4 diameter and groved like a big TORX screwdriver bit. They were real heavy and hard to bend but were bendable, with only about a 1/2 " hole down center, but harder than the pure lead in the same bin. There was about 1500# or so but I was worried that it had a light coating of freckle rust, from something ferrous. Any ideas what they were?