Page Yield*: 3500 *Per Cartridge at 5% coverage (ISO/IEC standard) Compatible with the following Okidata OKI Printers: C330dn, C331dn, C530dn, C531dn, MC361, MC362W, MC561, MC562w, MC890, MC950, and MC950 MFP Color: Black All compatible replacement cartridges are quality tested to ensure long-lasting use and bold, vivid print on every page. Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.