Lincoln K and KP Numbers › Lincoln Electric KP4745-S 9/20 SHORT BACK CAP Lincoln Electric KP4745-S 9/20 SHORT BACK CAP Sale Price: $16.84 Original Price: $18.86 9/20 SHORT BACK CAP PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000 Add To Cart Added! 9/20 SHORT BACK CAP PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000