Lincoln K and KP Numbers › Lincoln Electric KP4766-2-B25 DIFFUSER, SLIP-ON, 550A, COPPER Lincoln Electric KP4766-2-B25 DIFFUSER, SLIP-ON, 550A, COPPER Sale Price: $650.45 Original Price: $728.50 DIFFUSER, SLIP-ON, 550A, COPPER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 25.000 Add To Cart Added! DIFFUSER, SLIP-ON, 550A, COPPER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 25.000