MTI TK-310/ TK-312 Compatible MICR Toner Cartridge for Check Printing, for Kyocera Mita FS-2000D, 3900DN, 3900DTN, 4000DN, 4000DTN If you do not receive your product in an MTI-branded box, it is not a genuine MTI product. Let Amazon know. Compatible Printers: Kyocera Mita FS-2000D, FS-3900DN, FS-3900DTN, FS-4000DN, FS-4000DTN Contains magnetic toner for printing checks Replaces OEM Part #s: TK-310/ TK-312 | Yield: 12k standard pages Compatible Printers: Kyocera Mita FS-2000D, FS-3900DN, FS-3900DTN, FS-4000DN, FS-4000DTN