COMPATIBLE DELL 310-6640 x4 TONER CARTRIDGE FOR USE IN DELL 1100 LASER PRINTER Alternative to OEM, comes with ONE YEAR WARRANTY from the date of purchase against manufacturer defects. Page Yield: Black 2000 pages at 5% coverage on Letter/A4 paper. This replacement Toner cartridge is built to ISO9001 and ISO14001 Factory Standards. Compatible with Dell 1100