Lincoln K and KP Numbers › Lincoln Electric KP5819-1 PROTECTIVE LENS - FLEX LASE 20 Lincoln Electric KP5819-1 PROTECTIVE LENS - FLEX LASE 20 Sale Price: $244.64 Original Price: $274.00 PROTECTIVE LENS - FLEX LASE 20 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 10.000 Add To Cart Added! PROTECTIVE LENS - FLEX LASE 20 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 10.000