Lincoln Service Parts 1 › Lincoln Electric 9SG6444 PLENUM BACK G6444 Lincoln Electric 9SG6444 PLENUM BACK G6444 Sale Price: $190.35 Original Price: $218.90 PLENUM BACK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! PLENUM BACK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1