Lincoln K and KP Numbers › Lincoln Electric KP4766-2 DIFFUSER, SLIP-ON, 550A, COPPER Lincoln Electric KP4766-2 DIFFUSER, SLIP-ON, 550A, COPPER Sale Price: $28.27 Original Price: $31.66 DIFFUSER, SLIP-ON, 550A, COPPER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! DIFFUSER, SLIP-ON, 550A, COPPER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000