The surprisingly high capacity genuine Ricoh 841819 contains enough magenta toner powder to grant you an estimated 18,000 prints. This high yield means that your cost per page is very low for an original Ricoh magenta toner cartridge, making the 841819 quite an anomaly in the industry.Each of these Ricoh 841819 toner cartridges is compatible with a wide range of four-colour laser printers including the Aficio MPC3503SP. As the manufacturer, Ricoh offer a full warranty for the 841819 directly, meaning this purchase of a high quality magenta toner cartridge comes completely risk free.