With an impressive 6,400 estimated page yield the Ricoh 406990 is the most cost effective genuine toner cartridge available for the Ricoh Aficio SP3500N and many other printers. Designed and produced by Ricoh to work seamlessly with your printer, the quality of the 406990 mono laser toner cartridge is palpable. If the assurance of quality prints from the word go is not enough, our Ricoh 406990 toner cartridges come fully guaranteed and can be delivered free of charge within the UK.