Black Toner Cartridge (32,000 Pages) for Xerox Phaser 7750 Printers. Our Phaser 7750 toner cartridges utilize a revolutionary new toner manufacturing process where toner is chemically grown and processed into very small and consistent particles, resulting in sharper, high-gloss image quality, an increased range of colours, enhanced fine-line detail and superior reliability. Our new longer-life toner cartridges reduce the need for customer interaction.