GREENCYCLE 6-Pack Compatible Toner Cartridge Replacement for HP 42A Q5942A 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 10,000 pages per Q5942A 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: LaserJet 4240 4240n 4250 4250dtn 4250dtns 4250dtnsl 4250n 4250tn 4350 4350dtn 4350dtnsl 4350n 4350tn 4350mfp 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.