Lincoln K and KP Numbers › Lincoln Electric KP2747-1-B25 DIFFUSER, THREAD-ON, 550A Lincoln Electric KP2747-1-B25 DIFFUSER, THREAD-ON, 550A Sale Price: $365.63 Original Price: $409.50 DIFFUSER, THREAD-ON, 550A PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 25.000 Add To Cart Added! DIFFUSER, THREAD-ON, 550A PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 25.000