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Each cartridge individually print tested at manufacturing stage. For use within: Epson Expression Home XP-2100 : XP-3100 : XP-4100 : XP-2105 : XP-3105 : XP-4105 : Epson WorkForce WF-2810 : WF-2830 : WF-2835 : WF-2850. Colour - Black. Up to 500 Pages.