Lincoln K and KP Numbers › Lincoln Electric KP5707-2 MAGNUM PRO HDE 350 FLEXIBLE GUN TUBE Lincoln Electric KP5707-2 MAGNUM PRO HDE 350 FLEXIBLE GUN TUBE Sale Price: $231.57 Original Price: $259.36 MAGNUM PRO HDE 350 FLEXIBLE GUN TUBE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! MAGNUM PRO HDE 350 FLEXIBLE GUN TUBE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000