Compatible with: Dell Multi-Function e525w printer cartridges This Packages Includes the following Compatible Cartridges: 4 Dell Toner E525w Black Toner 593-BBJX DPV4T Black Page Yield*: 2,000 For best results, store in a cool, dry place. Use within 3 years of purchase for optimal performance.*at 5% coverage (ISO/IEC standard) Professionally manufactured by LD Products. Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.