Toner Eagle Toner Refill Kit Compatible with HP CP1210 CP1215 CP1217 CP1510 CP1515N CP1518NI CM1312 CM1312NFI CM1312NFI MFP CB540A, CB541A, CB542A CB543A Including Chips [4-Color Pack] Toner is designed specifically to work in the Hewlett Packard C9730A, C9731A, C9732A and C9733A toner cartridges for use in the HP 5500 and 5550 color laser printers. We test many toner samples from toner manufacturers. Most are rejected as they do not meet the look and specifications of the OEM toner. The toner we sell DOES match OEM toner! You will save up to 80% on the cost of your toner cartridges. Refilling your own toner cartridges is more environmentally friendly than buying new, compatible, or even remanufactured toner cartridges. We provide easy-to-follow instructions with photographs of the process. The process is so easy that most people do not need help. But if you do need help, we're just a phone call away! We guarantee that you will be happy with your purchase or we'll refund your money.