Lincoln Service Parts 1 › Lincoln Electric 9SG3972 FIREWALL (BLACK) G3972 Lincoln Electric 9SG3972 FIREWALL (BLACK) G3972 Sale Price: $362.35 Original Price: $416.70 FIREWALL (BLACK) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! FIREWALL (BLACK) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1