Printer model：T6715 T6716 Ink Maintenance Box For WorkForce Pro WF-3820 WF-4820 EC-4020 WF-4830 WF-4720 WF-4834 WF-4734 WF-4730 WF-4740 EC-4030 WF-M5799 WF-C5710 WF-M5299 WF-C5210 EC-4040 WF-C529R WF-C579R WF-C5790 WF-4833 WF-C4310 WF-3823 WF-C4810 printers. High quality Ink Maintenance Tank Box High quality cotton for better absorption, prevents any printing head clogged and reduces damage to the printer head. Easy-to-use ink maintenance cartridges are easily replaced Smart chip, easy to identify the printer Passed ISO-9001.Protect the environment, together with us. Start with green jobs