All of the EcoTone products are remanufactured with only original empty cartridges under the following international quality standards and certifications. They are produced in ISO 9001 / 14001 certified manufacturing facilities under stringent quality control guidelines to ensure the highest level of quality and reliability. Our cartridges are STMC certified and go through a rigorous testing process standard to ensure you receive the absolute best printing results. They have been tested and monitored for performance quality and page yield.View Less Features Alternative to OEM Products are built from empty, original brand name cartridges to ensure performance and quality of impression. Every cartridge is tested to produce flawless impression. Certified STMC (Standardized Test Methods Committee): global, standardized test methods are used to evaluate toner printer cartridge performance.