JetSir Ink for HP Hp Officejet Pro ink types: dye ink for hp 950, prefect print effect environment friendly materials, responsible for environment low price but high quality, rigorous factory testing before delivery ISO-9001 and CE, MSDS certificate approved, 12 months warranty, in order to protect your interests, please make sure your order sold by "JetSir" complete supply chain, we also offer the CIS system and cartridges