Lincoln Service Parts 2 › Lincoln Electric 9SS19736 POLARITY SWITCH SHIELD S19736 Lincoln Electric 9SS19736 POLARITY SWITCH SHIELD S19736 Sale Price: $5.88 Original Price: $6.76 POLARITY SWITCH SHIELD PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! POLARITY SWITCH SHIELD PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1