Choose compatible C3500 series toner cartridges for the best savings around. Purchasing LD compatible toner is an excellent way to save money without sacrificing print quality. The use of LD brand C3500 series cartridges does not void the printer warranty. LD toner cartridges are not manufactured or remanufactured by Okidata. Original Okidata brand cartridges are also available for those who prefer sticking to the name brand. All Okidata C3500 series toner options are backed by a 100% Quality Satisfaction Guarantee. There's nothing to lose!