Activated Carbon Block for Water Purifier The human body needs a constant supply of clean, healthy drinking water. While most municipal water supplies have been treated, your drinking water may contain bacteria and viruses, suspended solids, and harmful levels of chlorine. Ningbo HO manufactures high quality carbon block filter cartridges for water purification equipment .Our main raw material is certificated by NSF61, and the final product is certified by NSF/ANSI42 issued by WQA. Specifications Micron Rating: 1-5micron？ Chlorine Removal rating: 99% O. D: 63mm I. D: 38mm Length: 10" 20"？ Material: Imported Coconut shell activated carbon Maximum operating temperature: 60？Centigrade Maximum operating pressure: 0.7Mpa Maximum differential pressure: 0.4Mpa？