Compatible with: HP LaserJet & LaserJet Pro: P1109W Professionally manufactured by LD Products Page Yield*: 1,600* For best results, store in a cool, dry place. Use within 3 years of purchase for optimal performance. *Average cartridge Page Yield* in accordance with ISO IEC 24711. *at 5% coverage (ISO/IEC standard) MICR toners are specifically designed for printing professional checks, made possible by a special iron in the toner that allows the check to be detected and passed through a banks scanning system Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.