Lincoln K and KP Numbers › Lincoln Electric KP4256-1 PRO BARREL FLEXIBLE GUN TUBE ADAPTOR Lincoln Electric KP4256-1 PRO BARREL FLEXIBLE GUN TUBE ADAPTOR Sale Price: $107.85 Original Price: $120.79 PRO BARREL FLEXIBLE GUN TUBE ADAPTOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! PRO BARREL FLEXIBLE GUN TUBE ADAPTOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000