ROHS (Restriction of Hazardous Substances) proves that our ink cartridges strictly control and restrict the use of six dangerous materials found in electrical and electronic products and concern more about human health. ISO9001 (International Organization for Standardization)shows that the quality management and assurance of our ink cartridges has tightly conform to the international standards. ISO 14001 (International Organization for Standardization) admits all functions of the environmental management system of our ink cartridges work well in accordance with the worldwide requirements. STMC (Standardized Test Methods Committee) states that we have captured the requirements through international standard methods, thus the quality of our ink cartridges has attained the leading quality of the world. CE (Conformite Europeenne) signifies that our ink cartridges fulfill the requirements of goods security and are allowed to trade in European areas. Compared to most compatible consumables, our ink cartridges pay much attention to the quality of the products as well as human health. All products made of high-quality raw materials can save about two-thirds of the cost instead using original supplies. 100% satisfaction guarantee: 24-month warranty and 36-month shelf life. LCL series are your best choice.