Lincoln Service Parts 1 › Lincoln Electric 9SM18720-29 RELAY M18720-29 Lincoln Electric 9SM18720-29 RELAY M18720-29 Sale Price: $1,022.15 Original Price: $1,175.47 RELAY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! RELAY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1