PrinterDash Compatible MICR Replacement for ProXpress M3320/M3370/M3820/ M4020/M4024/M4070 Series High Yield Toner Cartridge (5/PK-5000 Page Yield) (SU901A_5PK) - Walmart.com
Amazon.com: Toner Cartridge MLT-D203L Works for Samsung Pro Xpress M3320 M3310 M3820 M4020 M3370FD M3870 M4070FD FW M4072 Printer, Yields Up to 10,000 Pages Black : Office Products
Amazon.com: Toner Cartridge MLT-D203L Works for Samsung Pro Xpress M3320 M3310 M3820 M4020 M3870 Series Monochrome Laser Printer, Yields Up to 5,000 Pages with Chip 2 pcs Black : Everything Else