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   Conforms to the market requirement, joins during the market competition by its superior quality also as provides extra comprehensive and exceptional service for consumers to let them turn into significant winner. The pursue of the business, is definitely the clients' gratification for K33 filter cartridge, High output volume, top quality, timely delivery, and your satisfaction are guaranteed. We welcome all inquiries and comments. If you are interested in any of our products and solutions or have an OEM order to fulfill, be sure to feel free to contact us now. Working with us will save you money and time. Email: info@ro-hid.com