Lincoln K and KP Numbers › Lincoln Electric K3136-3 MAGNUM PRO 550 DUAL SCHEDULE, 20' Lincoln Electric K3136-3 MAGNUM PRO 550 DUAL SCHEDULE, 20' Sale Price: $1,318.46 Original Price: $1,476.68 MAGNUM PRO 550 DUAL SCHEDULE, 20' PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! MAGNUM PRO 550 DUAL SCHEDULE, 20' PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000