Atwood Hydro Flame Furnace High Tension Lead w/ Spades. 16 " Length. Fits Models: 8516 IV III (After serial number 0654747); 8520 IV III (After serial number 0654747); 8525 IV III (After serial number 0654747); 8531 IV III (After serial number 0654747); 8535 IV III (After serial number 0654747); 1522 2-Stage; 2334 2-Stage; R-25