Includes 1 cyan, 1 magenta and 1 yellow ink cartridge. Perfect for lighter use. It also offers worry-free handling which helps prevent smudges, fade and water damage. Ideal for double-sided printing; inks will not bleed through. SmartValve Control Technology employs a pressure-activiated valve to smoothly and rapidly deliver ink to the printheads at variable rates. MicroPiezo ink level sensor accurately detects the ink level within the cartridge and automatically alerts the user when ink is low. Produces 50% more prints than regular Epson high-capacity ink cartridges. Compatible with Epson Stylus and WorkForce printers. Compatible with: Epson Stylus NX330 Small-in-One, NX430 Small-in-One, Epson WorkForce 435, 520, 545, 60, 630, 633, 635, 645, 840, 845, WF-3520, WF-3520DWF, WF-3540, WF-3540DTWF, WF-7010.