Lincoln Service Parts 1 › Lincoln Electric 9SM12478-1 ADAPTER PLATE ASBLY M12478-1 Lincoln Electric 9SM12478-1 ADAPTER PLATE ASBLY M12478-1 Sale Price: $301.45 Original Price: $346.67 ADAPTER PLATE ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! ADAPTER PLATE ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1