MICRoMICR THN-05A Black MICR Toner Cartridge Is Specially Made For Encoding Checks - Replaces Regular Toner With Special Magnetic Ink Character Recognition Toner - Printing Your Own Encoded Checks Saves You The Expense Of Ordering Pre-Encoded Checks - All You Need Is The MICR Toner, Blank Check Stock And The MICR Font Installed On Your Printer - The Iron Oxide In The Toner Allows The Magnetic Reader Sorter At Your Bank To Read The Symbols At The Bottom Of The Check - Yields Up To 2,500 Pages