MTI 330-4131 | P579k (M797k) MICR Toner Cartridge for Check Printing Compatible with Dell LaserJet Printers: 2230, 2230d If you do not receive your product in an MTI-branded box, it is not a genuine MTI product. Let Amazon know. Compatible Dell Printers: 2230d, 2230d Magnetic toner for check printing OEM Part #: Dell 330-4131, P579k, M797k | Yield: 3,500 Pages