Specification

• can use  for LaserJet Pro M12a, LaserJet Pro M12w,
  LaserJet Pro MFP M26nw, LaserJet Pro MFP M26a
• 4 x Black Replacement Toner Cartridge inside the package.
• Page Yield: Up to 1,000 pages per cartridge (5% coverage A4 size paper)
• Manufactured in ISO9001 & ISO14001 certified factory
• Brand new replacement toner cartridge (NON-OEM) that meets or
  exceeds OEM specifications with cost effective price,
  does not void your printer’s warranty.