Lincoln Service Parts 1 › Lincoln Electric 9SM21923-1 WIRE DRIVE CEILING INSULATION M21923-1 Lincoln Electric 9SM21923-1 WIRE DRIVE CEILING INSULATION M21923-1 Sale Price: $35.34 Original Price: $40.64 WIRE DRIVE CEILING INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! WIRE DRIVE CEILING INSULATION PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1