1 X Refillable ink cartridge 88 88XL for HP officejet pro K550DTWN L7500 L7400 K8600 L7580 L7590 L7550 L7750 L7780 K550 PRINTER<img src="http://ecx.images-amazon.com/images/I/41t9GnD6OqL.jpg" noproxy>