Two unused items. 【High-Performance Filtration】 Cleansui's water purifier cartridges have a filtration capacity of 1.6L/min and effectively remove various impurities. They are particularly excellent at removing chlorine, lead, and pesticides. 【Safe Materials】 This cartridge is made of ABS resin, which is durable and can be used for a long time. Safety is also taken into consideration. 【Easy Replacement】 This is a package of 4 cartridges, and they can be easily replaced as needed. Regular maintenance is easy, and you can enjoy clean water at any time. - Brand: Cleansui - Model Number: MDC01S - Material: ABS resin - Filtration Capacity: 1.6L/min - Usable Pressure: 0.07MPa - Substances Filtered: Chlorine, turbidity, lead, pesticides, mold, bacteria, etc. Thank you for viewing.