Lincoln Service Parts 1 › Lincoln Electric 9SM20155 INPUT DIODE HEAT SINK M20155 Lincoln Electric 9SM20155 INPUT DIODE HEAT SINK M20155 Sale Price: $62.27 Original Price: $71.61 INPUT DIODE HEAT SINK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! INPUT DIODE HEAT SINK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1