I think I've solved the mystery. The guy at Exile might have been mistaken when he told me all they had left was 8lb cannon balls. I've used downriggers quite a bit while fishing on the coast, but never my own boat, so I don't know much about rigging one up. Does this say 08, as in 8lbs, or 80, as in 80 oz's? If it's 80oz, I been duped! That's a 5lb ball.