LKF-522G/A Quick Change Activated carbon Cartridges Filter Filter Spec Place of Origin Taiwan Brand Name LifeTech Model Number LKF-522 Filter Spec. LK Cartridges Filter Filter Material Granular activated carbon or Composite Activated carbon fiber Material Origin Granular activated carbon ：Taiwan Activated carbon fiber：Japan Effect Filter out lead, chlorine and odor. part of pesticides chemicals - Suitable for LKP quick change water purifier LKF-522G Granular activated carbon Filter out chlorine and odor, part of pesticides chemicals such in the water. LKF-522A Add-silver composite carbon fiber Filter out large particle impurities. Can filter out lead, chlorine and odor, part of pesticides chemicals such in the water. Why Activated carbon fibers Activated carbon can filter out residual chlorine and odor, while the activated carbon fibers has a better adsorption effect and longer service life. As the surface of activated carbon fibers have a large number of fine pores within the surface area, adsorption speed is very fast, is granular activated carbon, or carbon block 5~10 times.   More information, please visit