Lincoln Service Parts 1 › Lincoln Electric 9SM21923-9 MOUNTING FLANGE INSULATION M21923-9 Lincoln Electric 9SM21923-9 MOUNTING FLANGE INSULATION M21923-9 Sale Price: $13.38 Original Price: $15.39 MOUNTING FLANGE INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! MOUNTING FLANGE INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1