L-ink brand remanufactured ink and toner cartridges have long been synonymous with quality and efficiency in the printing consumables industry. All of our L-ink brand cartridges go through rigorous quality control and testing, and are certified ISO14001 and ISO9001 Our L-ink brand remanufactured black inkjet cartridge offers a more economical option to the HP 21 original cartridge, without sacrificing quality and performance. You can safely rely on L-ink brand cartridges to deliver true-to-life photos, rich laser quality text, and sharp images without the risk of bleeding or smudging. Compatible Printer list for L-ink 21 ink cartridge: • PSC 1410 • DeskJet 3747 • 3910 • 3915 • 3920 • 3930 • 3940 • D1311 • D1320 • D2320 • D2400 • F300 • F310 • F340 • F350 • F370 • F380 • F390 • F2120 • F2210 • F4100 • FAX 1250 • OFFICEJET 4315 • PSC 1401 • PSC 1410V