Lincoln Service Parts 2 › Lincoln Electric 9SS31227-56 DIFFUSE PLATE BACKDRAFT PANEL S31227-56 Lincoln Electric 9SS31227-56 DIFFUSE PLATE BACKDRAFT PANEL S31227-56 Sale Price: $144.17 Original Price: $165.79 DIFFUSE PLATE BACKDRAFT PANEL PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! DIFFUSE PLATE BACKDRAFT PANEL PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1