Compatible for HP Printer: Laser Jet M1536 / Laser Jet M1536DNF / Laser Jet M1536 MFP / Laser Jet P1560 / Laser Jet P1566 / Laser Jet P1600 / Laser Jet P1606 / Laser Jet P1606DN Printer 4 Pack CE278A Black Toner Cartridge Up to 2,100 pages per CE278A black toner cartridge (based on 5% coverage of Letter size Paper). Actual toner yield varies with usage, graphics printed and environmental conditions. GREENCYCLE cartridges are made of quality materials: toner powder, smooth OPC & roller and industrial grade packaging. Make your presentations and printouts stand out with GREENCYCLE toner cartridge that produces clear, crisp, bold, and eye-catching text and graphics. Reliable after-sales service: We have established a professional, trustworthy and friendly team. If you ever have any questions or experience any issues with your item, our team will be happy to assist you quickly.