This is a compatible replacement laser toner cartridge to replace the Dell 310-9319 TX300 high yield black cartridge. It is guaranteed to perform with your 1125 Dell laser printer. These compatible alternatives to the Dell 310-9319 cartridges are manufactured 100% brand new by a manufacturer that is not endorsed or associated with Dell and are guaranteed by LDProducts.com to work with your Dell printer. Our compatible alternatives for OEM 310-9319 laser toner cartridges and supplies are manufactured to the highest performance and quality standards and will deliver optimal prints. Our compatible laser toners are an economical alternative to expensive OEM TX300 Dell laser toners, and offer big savings over brand-name 3109319 laser toner cartridges and supplies. Since we directly import these compatible alternatives for the Dell OEM 310-9319 / TX300 laser toner cartridges from an ISO-9001 certified factory, we can pass the savings on to you. Replaces lower yield part numbers UW919 and 310-9318. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty. All of our replacement toner cartridges compatible with Dell laser printers contain a toner management computer chip system that works with Dell printers*, which helps the cartridge communicate more effectively with your computer.We offer a Two Year 100% Quality Satisfaction Guarantee on our alternative compatible laser toner cartridges and supplies to replace the Dell OEM 310-9319. For use in the following printers Multi-Function 1125.