I have two black "HP 45" inket cartridges and don't even own an HP printer. Free tomorrow or whenever to anybody who wants them, just email me off-list. There's a list of compatible printers here: http://h10025.www1.hp.com/ewfrf/wc/fastFaqLiteDocument?lc=en&cc=us&dlc=en&docname=bpa02045 See you tomorrow! -jason