TRUE IMAGE HEQ6511X Compatible Toner Cartridge Replacement for HP Q6511X (Black) Premium quality toner with easy to install design Estimated page yield of 6,400 pages @ 5% coverage based on ISO/IEC 19752 (letter/A5 size) Compatible with HP Printers: LaserJet 2400, 2410, 2420, 2420D, 2420N, 2420DN, 2430N, 2430TN, 2430DTN; Canon LBP3460 1-pack True Image high yield black toner cartridge replaces HP Q6511X Warranty: Lifetime 100% satisfaction guarantee