1.CISS system for T1241-T1244 2.Be fit for:Epson NX125/NX420/WF520 3.With USB chip 4.PP tanks 5.Good function CISS (Continuous Ink Supply System) Be fit for EPSON NX125/NX420/WF520Cartridge no.: T1241-T1244Color: BK,C,M,YAttached tank is 100ml each tank 60ml/85ml/90ml/100ml/110ml /150 and 200 ml tanks is optional.with USB chips . With ink or empty is optional.Easy installationGood and steady function Save your cost 80%

CISS for Epson NX125/NX420/WF520