By me they throw clean Extruded, Sheet, Gutters, Ladders, Etc. all into one bin. The scale guy told me to not separate all of that because it all goes into the same bale. I do separate out clean cast from the rest even though I may not have to. Ask for a price sheet at your yard next time, it will show EVERY category that they have and their price. I cannot tell you how much this has helped me in the past. And as people have said before, READ READ AND READ AGAIN!