Choose compatible MX-31 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 MX-31 series cartridges does not void the printer warranty. LD toner cartridges are not manufactured or remanufactured by Sharp. Original Sharp brand cartridges are also available for those who prefer sticking to the name brand. All Sharp MX-31 series toner options are backed by a 100% Quality Satisfaction Guarantee. There's nothing to lose!