The Epson Alarm Clock 27 Black Ink Cartridge is smudge, water, and highlighter resistant for 350 pages of printing. Using DURABrite Ultra ink, the Alarm Clock 27 (C13T27014012) helps you to produce quality documents.Compatible printers:- Epson WF-3620WDF- Epson WF-3640DTWF- Epson WF-7110DTW- Epson WF-7610DWF- Epson WF-7620DTWF