Lincoln Service Parts 1 › Lincoln Electric 9SL3545-18 ARC POLARITY SWITCH L3545-18 Lincoln Electric 9SL3545-18 ARC POLARITY SWITCH L3545-18 Sale Price: $1,053.37 Original Price: $1,211.38 ARC POLARITY SWITCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! ARC POLARITY SWITCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1