Lincoln K and KP Numbers › Lincoln Electric KP2089-1 GUN TUBE INSULATOR / THREAD PROT., FCAW Lincoln Electric KP2089-1 GUN TUBE INSULATOR / THREAD PROT., FCAW Sale Price: $91.52 Original Price: $102.50 GUN TUBE INSULATOR / THREAD PROT., FCAW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 10.000 Add To Cart Added! GUN TUBE INSULATOR / THREAD PROT., FCAW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 10.000