Without HP 142 toner cartridges, you can't print documents and images with your HP laser printer. First check on the product page if these toner cartridges fit in your laser printer. For example, these 142 HP toner cartridges are suitable for the HP LaserJet MFP M140w and the HP LaserJet M110w printer 7MD66F. With a black HP 142A toner cartridge, you can print about 950 pages. Choose a combo pack, so you don't have to worry about having too little ink for a while.