These refill packs require the chip from the original HP toner cartridge to be reused. It's easy to do. And worth the money. These refills are a fraction of the price of HP refills and work very well and last a long time. Just be sure to keep the chip from the cartridge that came with the original HP toner that your printer came with. Even though these refills don't come with a chip, the savings are worth the extra step of replacing toner cartridges. I bought them twice and I really like them.
Cartridge NV Print CE285A for HP LaserJet Pro P1102/P1102w/M1132/M1212nf/M1217, black
13 Review
HP 62XL Tri-color High-yield Ink, Compatible with HP ENVY 5540, 5640, 5660, 7640 Series, HP OfficeJet 5740, 8040 Series, HP OfficeJet Mobile 200, 250 Series, Instant Ink Eligible, C2P07AN
12 Review
Get Quality Prints with HP 78A/CE278D Toner-Cartridges for LaserJet Pro M1536 and MFP P1606
11 Review
4-Pack Toner Bank Compatible Replacement for Brother TN760 TN-760 TN730 TN-730 Black Toner Cartridge for MFC-L2710DW DCP-L2550DW HL-L2350DW HL-L2390DW MFC-L2750DW HL-L2395DW HL-L2370DW Printer Ink
11 Review