Lincoln K and KP Numbers › Lincoln Electric KP2773-1-B25 INSULATOR 550 Lincoln Electric KP2773-1-B25 INSULATOR 550 Sale Price: $260.49 Original Price: $291.75 INSULATOR 550 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 25.000 Add To Cart Added! INSULATOR 550 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 25.000