L-ink brand compatible 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 ISO9001Our L-ink brand compatible ink cartridge set offers a more economical option to the HP 934 & 935 original cartridges, 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 934 & 935 inkjet set:• LaserJet Pro 6812• LaserJet Pro 6815• OfficeJet Pro 6230• OfficeJet Pro 6830• OfficeJet Pro 6835