Lincoln Service Parts 1 › Lincoln Electric 9SM27996 DUCT COUPLING FEMALE, 6 IN M27996 Lincoln Electric 9SM27996 DUCT COUPLING FEMALE, 6 IN M27996 Sale Price: $38.36 Original Price: $44.11 DUCT COUPLING FEMALE, 6 IN PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! DUCT COUPLING FEMALE, 6 IN PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1