The 138X Black Toner Cartridge 2-Pack is a compatible product designed for use with HP LaserJet Pro 3001 MFP 3101 printers. This laser print technology cartridge comes in a unit quantity of two, ensuring a steady supply of black toner for your printing needs. With a model number of 138X, this product is specifically tailored to fit the requirements of HP printers, offering reliable and high-quality results for your documents and images.