Lincoln K and KP Numbers › Lincoln Electric KP4753-18 1/8" STANDARD 9/20 GAS LENS Lincoln Electric KP4753-18 1/8" STANDARD 9/20 GAS LENS Sale Price: $33.70 Original Price: $37.74 1/8" STANDARD 9/20 GAS LENS PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000 Add To Cart Added! 1/8" STANDARD 9/20 GAS LENS PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000