WORLDS OF CARTRIDGES Remanufactured Toner Cartridge Replacement for Xerox 113R00711 / 113R00712 (Jumbo Black: 90% Higher Yield compared to 113R00711). Each product is individually print tested and guaranteed to perform with compatible OEM fax/printer and does not void your fax/printer's warranty. FOR USE IN: Xerox Phaser 4510, 4510/B, 4510/DT, 4510/DX, 4510/N, 4510/YB, 4510/YDT, 4510/YDX, 4510/YN. YIELD: 19,000 pages (@ 5% coverage). WORLDS OF CARTRIDGES products are guaranteed to meet or exceed original OEM products in both print quality and page yield. They are primarily made in ISO 9001/14001 and STMC quality certified factories using the highest quality new and recycled components. WARRANTY: Premium 100% full lifetime guarantee. See WORLDS OF CARTRIDGES profile page for more information.