Lincoln Service Parts 1 › Lincoln Electric 9SM19979 HEAT SINK INSULATION M19979 Lincoln Electric 9SM19979 HEAT SINK INSULATION M19979 Sale Price: $2.07 Original Price: $2.38 HEAT SINK INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! HEAT SINK INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1