Lincoln Service Parts 1 › Lincoln Electric 9SM21923-10 SMALL FLANGE INSULATION M21923-10 Lincoln Electric 9SM21923-10 SMALL FLANGE INSULATION M21923-10 Sale Price: $12.84 Original Price: $14.77 SMALL FLANGE INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! SMALL FLANGE INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1