HP 973X - High Yield - magenta - original - PageWide - ink cartridge - for PageWide Managed MFP P57750, P55250; PageWide Pro 452, 477. Count on professional-quality colour documents for a great value. Get a lower cost per page than standard cartridges and the results you expect every time with Original HP PageWide high-yield cartridges, precisely tuned to HP printers and MFPs.