LD Products carries refurbished replacement laser toner cartridges that are compatible with the Dell 3100cn. Our professionally remanufactured alternative cartridges are Dell OEM cartridges that have been modified and refurbished by a remanufacturer that has no affiliation with Dell*. Our low priced alternatives to Dell OEM Cartridges are manufactured to the highest performance and quality standards, and will deliver optimal prints when used in your Dell 3100cn. Purchasing our remanufactured replacement cartridges compatible with your Dell 3100cn is an excellent way to save money without sacrificing quality. LDproducts.com guarantees our Non-OEM Refurbished Laser Toner Cartridges' compatibility with your Dell 3100cn with a 'Two Year 100% Quality Satisfaction Guarantee'. The use of our refurbished laser toner cartridges compatible with the Dell 3100cn does not void your printer's warranty.