Lincoln K and KP Numbers › Lincoln Electric KP1990-1 GUIDE TUBE EXT, 3/32, 2-1/4 ESO Lincoln Electric KP1990-1 GUIDE TUBE EXT, 3/32, 2-1/4 ESO Sale Price: $81.46 Original Price: $91.24 GUIDE TUBE EXT, 3/32, 2-1/4 ESO PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! GUIDE TUBE EXT, 3/32, 2-1/4 ESO PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000