These printers use the STI-24B6237 cartridge:

Source-Technologies ST 9712

Source-Technologies ST 9712 MICR

Source-Technologies ST 9715

Source-Technologies ST 9715 MICR

Source-Technologies ST 9717

Source-Technologies ST 9717 MICR

Source-Technologies ST 9720

Source-Technologies ST 9720 MICR

Source-Technologies ST 9722

Source-Technologies ST 9722 MICR