Lincoln K and KP Numbers › Lincoln Electric KP1975-1 GUIDE TUBE EXTENSION SUPPORT, 1 INCH Lincoln Electric KP1975-1 GUIDE TUBE EXTENSION SUPPORT, 1 INCH Sale Price: $76.72 Original Price: $85.93 GUIDE TUBE EXTENSION SUPPORT, 1 INCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! GUIDE TUBE EXTENSION SUPPORT, 1 INCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000