Lincoln K and KP Numbers › Lincoln Electric KP2721-9 NOZZLE EXTENSION 9 IN FOR K231 Lincoln Electric KP2721-9 NOZZLE EXTENSION 9 IN FOR K231 Sale Price: $144.02 Original Price: $161.30 NOZZLE EXTENSION 9 IN FOR K231 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! NOZZLE EXTENSION 9 IN FOR K231 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000