Phaser 7760 toner cartridges utilize a revolutionary toner manufacturing process where toner is chemically grown & processed into very small & consistent particles, resulting in sharper, high gloss image quality, an increased range of colors, enhanced fine line detail & superior reliability. These longer life toner cartridges reduce the need for customer interaction, & the Black toner cartridges print up to 25, 000 pages each at 5% average area coverage.