4 Pack 3 HP 56 & 1 HP 57 compatible ink cartridges ISO 9002 Manufactured Product 100 percent Quality Guarantee For use in the following: 410 Digital Copier, Deskjet 450cbi, Deskjet 450cbi Mobile, Deskjet 450ci, Deskjet 450ci Mobile etc 4 Pack, Manufacturer Part Number: HP 56 HP 57