Lincoln Service Parts 1 › Lincoln Electric 9SL7518 HEAT SINK (DC POSITIVE) L7518 Lincoln Electric 9SL7518 HEAT SINK (DC POSITIVE) L7518 Sale Price: $284.60 Original Price: $327.29 HEAT SINK (DC POSITIVE) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! HEAT SINK (DC POSITIVE) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1