Each cartridge contains security properties which prevents “Check Washing”. This cartridge utilizes specially formulated MICR toner that meets ANSI/ABA standards to ensure proper MICR signal strength is met. Meets all US and Canadian banking standards. Yields up to 11,000 pages. Certification & Standards: Meets ANSI/ABA standards. Meets all U. S. and Canadian banking standards. For Use In: HP LaserJet Enterprise MFP M631, M632, M633 and M607 printers. Compatible to HP 37A (CF237A). This MICR Print Solutions cartridge is a genuine-new HP cartridge that has been specially configured for check printing.