4 Liter 970 CISS for HP Officejet Pro X451dn, 451dw, X476dn, X476dw, X551dw, X576dn, X576dw - HP 970 971 CISS

· 4 liter filled with premium pigment ink.
· Clogging free (If it clogs, we provide all cleaning solution or will recover your printhead)
· Easy 1-minute installation & easy refill 
· Made in USA with used HP genuine ink cartridges. 
· System tested more then 200, 000 pages with no failure.
· Yield : 360,000 pages with 4 liter ink 
· Ink level does not show properly after ink depleted sign appeared on printer, it will automatically change to unlimited chip