MTI © PRO products produce rich colors and crisp detail for impressive printing results page after page. MTI © PRO cartridges are engineered for businesses with professional printing demands to maximize your efficiency, increase performance and help manage your costs. MTI compatible color cartridges are manufactured in ISO 9001 certified facilities, ensuring that page yield and print quality match OEM standards. Some durable components may be remanufactured for your savings and to protect the environment. All our products are factory tested for quality, page yield and performance. We offer an exclusive 2-Year Manufacturer Warranty on our PRO product line. Our dedicated customer care staff is available 9 a.m. to 6 p.m PST, Monday through Friday, to answer any questions and provide technical support.