HP 80X 2-pack High Yield Black Original LaserJet Toner Cartridges, CF280XD

Hello Stephanie and thank you for your question! The CF280XC is a single cartridge while the CF280XD is a double cartridge package.

This HP 80A Black Original LaserJet Toner Cartridge is a standard toner cartridge for everyday use. Check printing requires the use of MICR toner. MICR (magnetic ink character recognition) is a technology invented in the 1950s that is used to verify the legitimacy or originality of checks and other paper documents. Special ink, which is sensitive to magnetic fields, is used to print certain characters on the original documents. MICR is commonly used by banks and other financial institutions to accelerate the processing and clearance of checks. Retailers also often use MICR readers to minimize their exposure to check fraud. The MICR line is the sequence of numbers and characters that appear at the bottom of a check. It consists of three number sets: the bank routing number, the account number, and the check number. The order of number sets is country-specific. These three sets of numbers act as unique identifiers for the check and the person who signs it.

Hello. Thanks for your question. The HP LaserJet Pro 4001dn printer uses the HP 148A or 148X toner.

Thanks for your question. That model will use the HP 148A or 148X toner. All the toner on the HP website will be genuine HP toner. Here is a link to the toner options for the LaserJet Pro 4001n model. https://www.hp.com/us-en/shop/sitesearch?keyword=148