Can also be sold separately for £1.50. 
Compatible with :  Expression XP-510 , Epson Expression XP-520 , Epson Expression XP-600 , Epson Expression XP-605 , Epson Expression XP-610 , Epson Expression XP-615 , Epson Expression XP-620 , Epson Expression XP-625 , Epson Expression XP-700 , Epson Expression XP-710 , Epson Expression XP-720 , Epson Expression XP-800 , Epson Expression XP-810 , Epson Expression XP-820