Lincoln K and KP Numbers › Lincoln Electric K3136-4 MAGNUM PRO 550 DUAL SCHEDULE, 25' Lincoln Electric K3136-4 MAGNUM PRO 550 DUAL SCHEDULE, 25' Sale Price: $1,427.67 Original Price: $1,598.99 MAGNUM PRO 550 DUAL SCHEDULE, 25' PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! MAGNUM PRO 550 DUAL SCHEDULE, 25' PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000