The use of Brother Genuine replacement ink cartridges like the LC3719XLC not only produces sharp, high-quality printouts with no streaking or smudging - it also lets you save money, time and paper due to less downtime or repairs. The Brother LC3719XLC cyan ink cartridge is for use with Brother inkjet printers. This printer cartridge is intelligently engineered to work in seamless unison without compromising the quality of the print.