Lincoln K and KP Numbers › Lincoln Electric K4531-4-FM-45 MAGNUM PRO CURVE HDE 250- FM, 25 FT Lincoln Electric K4531-4-FM-45 MAGNUM PRO CURVE HDE 250- FM, 25 FT Sale Price: $873.44 Original Price: $978.25 MAGNUM PRO CURVE HDE 250- FM, 25 FT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! MAGNUM PRO CURVE HDE 250- FM, 25 FT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000