DURABrite Ultra Inks offer superior image quality with smudge-resistance, water-resistance and fade-resistance for durable prints and are ideal for double-sided printing. DURABrite Ultra inks do not bleed through. They are quick-drying for worry-free handling of photos and deliver incredible print quality. Ink cartridges are designed for use with Epson WorkForce 60, 435, 520, 545, 630, 633, 635, 645, 840, 845, WF-3530, WF-3540, WF-7010, WF-7510, WF-7520; Stylus NX330 and NX430. Each cartridge yields approximately 480 pages.