Lincoln K and KP Numbers › Lincoln Electric KP4748-ST 17/18/26 STANDARD INSULATOR Lincoln Electric KP4748-ST 17/18/26 STANDARD INSULATOR Sale Price: $18.95 Original Price: $21.22 17/18/26 STANDARD INSULATOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000 Add To Cart Added! 17/18/26 STANDARD INSULATOR PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000