T6711 Compatible Waste Ink Tank Maintenance Ink Box for Epsn Product Name: T6711 Waste Ink Tank Ink Maintenance tank Package Including? 1pcs maintenance tank with chip Compatible for Epsn WF3520 WF3540 WF3620 WF3640 WF7110?WF7210?WF7510 WF7610 WF-7611 WF7620 WF7621 WF7710 WF7715?WF7720 WF7725 PX-M5040F ET-16500 Printer Smart chip,easy to recognized for printer Type: Black The T6711 Ink Maintenance Box stores ink that gets flushed from the system during print head cleaning. the maintenance box needs to be replaced when it is full.