Super Sterasyl Imperial filter manufactured by Royal Doulton UK.
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.
Model: Doulton Imperial 5 inch is the perfect size out of the Doulton range of water filter candles, great for stoneware gravity fed purifiers because of its height. It's wider than model 288 and a little taller, but not too tall that the lid won't sit on top.
* Dimension : 67 mm x 127 mm
* Filter Height : 12.7 cm (5 inch)
* Thread : 13 mm
* Activated carbon, ceramic filter w/ silver.
* Last approximately 2,000 litre or 1 year depending on water quality.
This candle can remove :
Cyst reduction (Cryptossporidium & Ciardia) > 99.99 %
Removes Algae, rust, sediment & Suspended solids > 99.99 %
Reduces Harmful Bacteria (E Coli, Cholera, Shigella, Salmonella) > 99.99 %
Turbidity reduction > 97 %
 Removes Guinea Worm 100 %
Chlorine reduction > 95 %
For particles between 0.5 and 0.8 micron > 99.99 %
Flow Rate Under Gravity 1 LPH