GREENCYCLE 10-Pack Compatible Toner Cartridge Replacement for HP 87X CF287X Toner (Black). Stability and Reliability: The chip has powerful computing and processing capabilities to perform efficiently. It is stable, reliable and functionally depleted to ensure normal operation in a variety of environmental conditions. Page Yield: Up to 18,000 pages per CF287X toner cartridge (based on 5% coverage of Letter size Paper) Actual toner yield varies with usage, graphics printed and environmental conditions. Compatible for HP Printer: Enterprise M506 / M506n / M506dn / M506x (Flow) , MFP M527 / M527z / M527f / M527dn / M527c , Pro M501 / M501n / M501dn Printer. Our cartridges are made of quality materials: smart chip, 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 that keep people awake at your next meeting.