Don't know much about these other than they came from a 32 year old (1982) Kramer Duke Special/Deluxe and it's a Schaller Double-J which was wired Series/Parallel/Phase. The magnets on these are uncannilly strong. As a matter of fact, I have heard rumor that these magnets were responsible for bringing the jet airliner down in L O S T . Edit: I don't think I was clear previously…these are actually four separate sections (currently wired as a humbucker), so other than throwing these back inside a Double-J cover (neck-width, BTW), I would think the mad-tinkerer would be able to dream up some crazy configurations (two Split-Js, two Split-Ps, etc). [DEL]$25[/DEL] $15 shipped Con-US. Thanks for lQQking!