Lincoln Service Parts 1 › Lincoln Electric 9SM27904-4 COVER PLATE M27904-4 Lincoln Electric 9SM27904-4 COVER PLATE M27904-4 Sale Price: $179.99 Original Price: $206.99 COVER PLATE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! COVER PLATE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1