Lincoln Service Parts 1 › Lincoln Electric 9SM18042 INPUT BOX UPGRADE KIT M18042 Lincoln Electric 9SM18042 INPUT BOX UPGRADE KIT M18042 Sale Price: $164.20 Original Price: $188.83 INPUT BOX UPGRADE KIT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! INPUT BOX UPGRADE KIT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1