Lincoln Service Parts 1 › Lincoln Electric 9SM20577-1 CONTROLLER M20577-1 Lincoln Electric 9SM20577-1 CONTROLLER M20577-1 Sale Price: $1,307.20 Original Price: $1,503.28 CONTROLLER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! CONTROLLER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1