Lincoln K and KP Numbers › Lincoln Electric KP55 GAS DIFFUSER-500A, 1/16-5/64, (55) Lincoln Electric KP55 GAS DIFFUSER-500A, 1/16-5/64, (55) Sale Price: $14.63 Original Price: $16.38 GAS DIFFUSER-500A, 1/16-5/64, (55) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! GAS DIFFUSER-500A, 1/16-5/64, (55) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000