Lincoln K and KP Numbers › Lincoln Electric KP5820-1 FOCUS LENS - FLEX LASE 20 Lincoln Electric KP5820-1 FOCUS LENS - FLEX LASE 20 Sale Price: $284.16 Original Price: $318.26 FOCUS LENS - FLEX LASE 20 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! FOCUS LENS - FLEX LASE 20 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000