Lincoln K and KP Numbers › Lincoln Electric KP2721-3 NOZZLE EXTENSION 3 IN FOR K231 Lincoln Electric KP2721-3 NOZZLE EXTENSION 3 IN FOR K231 Sale Price: $76.04 Original Price: $85.16 NOZZLE EXTENSION 3 IN FOR K231 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! NOZZLE EXTENSION 3 IN FOR K231 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000