Page Yield*: (25,000 pages) compatible with 37X 37 CF237A Black *at 5% coverage (ISO/IEC standard) Package Contents: 2 x 37X HY Black compatible toner cartridges CF237X Compatible with Enterprise: MFP M632z, M608n, M608dn, M608x, M609dh, M609dn, M609x, M609x, M631dn, M631h, M631dn, M631z, M632fht, MFP M632h, M633fh, M633z Tested to ensure long-lasting use and bold, vivid print on every page. Professional compatible replacements manufactured by LD Products. HP is a registered trademark of HP and is not affiliated with and does not endorse LD Products.