Lincoln Service Parts 1 › Lincoln Electric 9SM17014 ARC POLARITY SWITCH & MTGS ASBLY M17014 Lincoln Electric 9SM17014 ARC POLARITY SWITCH & MTGS ASBLY M17014 Sale Price: $239.45 Original Price: $275.37 ARC POLARITY SWITCH & MTGS ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! ARC POLARITY SWITCH & MTGS ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1