Lincoln K and KP Numbers › Lincoln Electric KP2747-1A DIFFUSER, THREAD-ON, 550 AMP Lincoln Electric KP2747-1A DIFFUSER, THREAD-ON, 550 AMP Sale Price: $16.11 Original Price: $18.04 DIFFUSER, THREAD-ON, 550 AMP PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! DIFFUSER, THREAD-ON, 550 AMP PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000