These ink cartridges have not been tested as I do not have a compatible printer. Ink can be heard inside when gently shaken Compatible with Epson printers using 912 / 912XL ink: Epson Workforce WF-3820DWF Epson Workforce WF-3825DWF Epson Workforce WF-4820DWF Epson Workforce WF-4825DWF
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