The water filters have different kinds,which are made from different materials, Such as spun PP filter cartridge, PP string wound nound filter cartridge, pleated cellulose filter cartridge, carbon...
http://www.nbnewsun.com/water_filter_cartridges.htm
Read more

Our products include:drinking <a href="http://www.cnwaterfilter.com/domestic_reverse_osmosis_system.htm">water filter reverse osmosis system</a>,<a...
http://www.cnwaterfilter.com
Read more

Undersink water filters are easy to install, and packaged in attractive retail cartons,complete with installation instructions
http://www.cnwaterfilter.com/undersink_water_filter.htm
Read more