HP W1143AD (#143AD) Twin Pack Genuine Black Toner Cartridge - 2,500 PagesHP #143A Genuine Black Toner Cartridge x2 (TWIN PACK) This HP # 143a Toner Cartridge will help to keep your printer producing sharp, crisp, professional documents. It's specially designed to work with HP printers and is easy to install so you can do it yourself. This cartridge can also be known by its model number W1143A It has an estimated page yield of 2,500 x 2 This cartridge is compatible for use with your HP Neverstop Laser 1001, 1201 and 1202