Lincoln K and KP Numbers › Lincoln Electric K3131-1 MAGNUM PRO 350 DUAL PROCEDURE, 10' Lincoln Electric K3131-1 MAGNUM PRO 350 DUAL PROCEDURE, 10' Sale Price: $784.73 Original Price: $878.90 MAGNUM PRO 350 DUAL PROCEDURE, 10' PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! MAGNUM PRO 350 DUAL PROCEDURE, 10' PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000