Lincoln K and KP Numbers › Lincoln Electric KP4757-4 #4 GAS LENS CUP, 9/20 Lincoln Electric KP4757-4 #4 GAS LENS CUP, 9/20 Sale Price: $9.46 Original Price: $10.60 #4 GAS LENS CUP, 9/20 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000 Add To Cart Added! #4 GAS LENS CUP, 9/20 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000