I bought the wrong kind of ink cartridges, but didn't realize it until I opened them. So, my loss is your gain if you have the right kind of printer!

These are remanufactured HP 564XL cartridges with the number CB321WN. They're larger than newer HP 564XL cartridges and not compatible with all printers that use the 564XL cartridge, so please check the InkPlusToner page below for compatibility before you email me:

http://www.inkplustoner.com/hp-564xl-ink-cartridge-hp-cb321wn-black-remanufactured-p-13516.html

Available for pick-up in Mountain View, or at the Stanford Medical Center during the work week.