Laser Tek Services Compatible High Yield Toner Cartridge Replacement for the HP Q6511X. (Black, 1-Pack) Package Contains: 1 x Compatible HP Q6511X High Yield Toner Cartridge. Page Yield: 12,000 pages @ 5% page coverage. Works in the following printers: HP LaserJet 2400, HP LaserJet 2410, HP LaserJet 2420, HP LaserJet 2420D, HP LaserJet 2420DN, HP LaserJet 2420N, HP LaserJet 2430, HP LaserJet 2430DTN, HP LaserJet 2430N, HP LaserJet 2430TN. Laser Tek Services offers a 1 year, 100% satisfaction guarantee on the purchase of any Laser Tek Services replacement cartridges, drums, and refill kits. The use of Laser Tek Services compatible replacement toner cartridges, inkjet cartridges, and drum units will not void your printer's warranty.