Micro Solutions Enterprises (MSE) is a global manufacturer and distributor of high-quality compatible toner cartridges that are sold exclusively through resellers, such as ColorTonerExpert. All of its products are manufactured in the United States in the city of Van Nuys, California.All MSE products are Intelligently Re-engineered™ to produce the highest quality cartridges that are on par with OEMs. MSE Brand Cartridges also come with an extended 3 Year Warranty.