Lincoln K and KP Numbers › Lincoln Electric KP1920-1 GUN TUBE ASBLY, 90 DEG. Lincoln Electric KP1920-1 GUN TUBE ASBLY, 90 DEG. Sale Price: $192.16 Original Price: $215.22 GUN TUBE ASBLY, 90 DEG. PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! GUN TUBE ASBLY, 90 DEG. PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000