Lincoln Service Parts 1 › Lincoln Electric 9SM19474-1 DIODE HEAT SINK M19474-1 Lincoln Electric 9SM19474-1 DIODE HEAT SINK M19474-1 Sale Price: $105.59 Original Price: $121.43 DIODE HEAT SINK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! DIODE HEAT SINK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1