HID™ has two kinds of Post-Active Carbon Water Filter Cartridge: T33 & K33, both of which are activated carbon and used in RO water purifier system. T33 & K33 Water Filter Cartridge is mainly used as the last filter. It is a kind of filter element made of high-quality coconut shell activated carbon or apricot shell activated carbon, without any binding powder, directly filled into the plastic water purifier cartridge. This filter element has very good sealing performance. They have a good effect of adsorbing organic matter, and can effectively remove peculiar smell and residual chlorine in water. It can make the filtered water decolor, clarify, transparent, and taste better. Light spot: 1. Integrated cap 2. High-grade material 3. High quality activated carbon   Persisting in "High high quality, Prompt Delivery, Aggressive Price", we've established long-term cooperation with clients from the two overseas and domestically and get new and old clients' superior comments for T33 filter, K33 Filter Cartridge, Water Filter Cartridge, Our product quality is one of the major concerns and has been produced to meet the customer's standards. "Customer services and relationship" is another important area which we understand good communication and relationships with our customers is the most significant power to run it as a long term business.