The 12 month or 2000 litre super sterasyl filter manufactured by Royal Doulton is far and the way the best gravity filter manufactured anywhere.With its Absolute filtration rating (defined as >99.99%) of 0.9 microns, this filter is highly effective against particulate contamination, pathogenic bacteria, cysts, giardia, cryptosporidium as well as chlorine and organic removal capabilities. This filter has been tested and certified to The World Health Organization and the national laboratory standards of over 50 countries.
(67mm x 127mm)
