Patented design Piano Book CISS for HP 88, HP 88XL(non-OEM), Continuous Ink Supply System for HP Printers: K5300, K5400, K5400dn, K5400dtn, K5400n, K5400tn, K550, K550dtn, K550dtwn, K8600, K8600, K8600dn, L7000, L7400, L7480, L7500, L7550, L7555, L7580, L7590, L7600, L7650, L7680, L7681, L7700, L7710, L7750, L7780.

Easy Refill: No needles or syringes are needed ! No mess ! You can refill the Ink Tank directly with our Bulk Refill Ink (Additional Bulk Refill Ink sold separately in our store).
Easy Installation: Just 1 - 2 minutes to install. Super easy (Watch the installation video)!
Auto Reset Chips: Auto Reset Chips can automatically reset by themselves, which makes the cartridges can be used over and over again without limitation.
High Quality: Our refill ink is made in Germany. It is packed by ISO 9001:2000 Certified Factory, which guarantees the high quality.
Saving Costs: Refilling the cartridges by yourself, you can save about 90% of your costs on OEM cartridges. You will receive one set of Pre-filled, non-OEM Continuous Ink Supply System (CISS/CIS) for HP 88XL Piano Book Style. The Ink Tank is newly designed as Piano Book. They are brand new. Compatible with Printers: HP OfficeJet Pro Series: K5300, K5400, K5400dn, K5400dtn, K5400n, K5400tn, K550, K550dtn, K550dtwn, K8600, K8600, K8600dn, L7000, L7400, L7480, L7500, L7550, L7555, L7580, L7590 More »