Lincoln K and KP Numbers › Lincoln Electric K2952-2-1-564-550 MAGNUM PRO CURVE 400, 15 FT., 550A EXP. Lincoln Electric K2952-2-1-564-550 MAGNUM PRO CURVE 400, 15 FT., 550A EXP. Sale Price: $709.33 Original Price: $794.45 MAGNUM PRO CURVE 400, 15 FT., 550A EXP. PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! MAGNUM PRO CURVE 400, 15 FT., 550A EXP. PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000