Patented double yield HP newly manufactured black laser toner cartridges with 8 proprietary patents that more than doubles the number of printed pages compared to genuine HP branded toners. Independent testing by Rochester Institute of Technology verifies both the significantly higher page yields and the improved print quality as compared to HP toners. Higher page yields produce huge savings in money, time, and carbon footprint. Cartridges are made from new and recovered parts and not remanufactured. Product includes an unconditional 100 percent lifetime guarantee. The greenest cartridge available, less than half as many cartridges need to be manufactured, packaged, transported, and disposed of, producing a significant savings in petroleum, other raw materials, energy, fuel, and packaging material. Made using 37 percent post consumer recycled content by total weight of the cartridge. All components are 100 percent recyclable. Empty cartridges can be easily returned with the enclosed return label. Packaging is made from 100 percent recycled materials. Made in the U.S.A. Meets Executive Orders 13415 and 13423. For use with HEWLETT PACKARD LASERJET P2030, P2035, P2050, and P2055 printer series. OEM SKU CE505A and CE505X. Page yield 12,384.