Continuous Ink Supply System CISS( cis) Compatible for hp With ARC chip Auto Reset Chip Compatible cartridges HP 920XL BK/C/M/Y For Use With These Printers Officejet 6000-E609(CB051A)Officejet 6500A-E710a (CN555A)Officejet 6500-E709c(CB838A)Officejet 7000-E809(C9299A)Scanjet Enterprise 7500(L2725A)Officejet 7500A-E910a(C9309A) Package include 1 x empty -BLACK refillable cartridge 1 x empty -CYAN refillable cartridge 1 x empty MAGENTA refillable cartridge 1 x empty -YELLOW refillable cartridge 4pcs free syringes&needles Caution When you buy it ,please tell us these information notice that: IMPORTANT! ! ! ! ! what's type of your printer what's the model No. of the cartridges used on your printer 　 Please check the model of the ink cartridges and the model of the printer.Only when both of them are the same as the description here, then the Continuous Ink System can work properly. Since it may be difference cartridges model for same printer type, we have got a lot records but we may miss some special ones or you buy the printer internationally. HIGH QUALITY & LOW COST reduces printing costs up to 90%!ENVIRONMENTALLY FRIENDLY! Doesn't waste cartridges!THOUSANDS OF SATASIFIED CUSTOMERS SERVED! SEE OUR FEEDBACK!FRIENDLY STAFF full accessories READY TO ASSIST you with Installation $ aves over 95% compared to ink cartridges!Just open the rubber stopper located on top of the ink container and pour the ink in the opening to refill itComes with latest version compatible permanent chips.Easy installation: no professional skills, with our guide anyone can easily installEnvironmentally friendly: no need to change ink cartridge, can refill for countless times, cost-effectively and environmentally friendly. *PLEASE CONTACT US if you have any questions or concerns regarding installation so we can happily assist you. Seemingly large issues may be a quick, simple fix away!