The high grade filter is our top of the range cartridge and remains the leading filter media in Australia. The filter is made in the states but has the highest possible Australian certification along with American certification (nsf). This filter will remove greater then 99% of giardia and cryptosporidium (a common yet harmful bacteria) as wellas greater then 97% of lead which comes from your brass and copper pipes. Also removes chlorine taste colour and odour and other metals. A1 choice the best of the best.Sub-micron (0.45) - Coconut shell carbon - softens and sweetens water. Extruded Block cartridge for the 99.9% removal of Giardia & Cryptosporidium cysts, heavy metal reduction, particularly LEAD (98.3%). Chlorine, Chloroform and all volatile organic contaminants. Replace every 10,000 litres or 12 months. Specifications: (9 3/4") 25 cm. LongMore effective at reducing levels of chlorine, and certain volatile organic compounds (VOCs), than granular activated carbon (GAC) cartridges. Tested and verified to AS/NZS 4348 RESULTS OF INDEPENDENT TESTING - VOLATILE ORGANIC COMPOUNDS CHEMICAL INFLUENT CONCENTRATION (PPB) % REDUCTION HOME Chlorobenzene 80 95% Ethylbenzene 80 95% Hexachlorobutadiene 40 95% Tetrachloroethene... 80 95% Toluene 80 95% 1,1,2,2-Tetrachloroethane 80 95% RESULTS OF INDEPENDENT LABORATORY TESTING - CHLOROFORM (Performed at flow rates of l.9 litres per minute) VOL.INFLUENT (LITRES) INITIAL INFLUENT CHLOROFORM LEVEL (ppb) EFFUENT CHLOROFORM LEVEL (ppb) % REDUCTION 500 430ppb <5ppb 99.84% 1000 430ppb <5ppb 99.84% 1750 425ppb <5ppb 99.82% 2100 425ppb <5ppb 99.82% 2700 435ppb <5ppb 99.85% INDEPENDENT LABORATORY TESTING - CHLORINE Influent water containing an average of 3ppm free chlorine, at the high flow rate of 3.78 litres per minutes, cartridge removed an average of 97.5% of free chlorine for more than 9,000 litres INEPENDENT LABORATORY TESTING - LEAD removed an average of 98.3% over the suggested life of the cartridge.******THE REGULAR PRICE IS $88.00, BUT IF YOU WANT TO BUY IN BULK AND SAVE MONEY THEN SELECT A LARGER QUANTITY OF FILTERS THROUGH THE DROP DOWN MENU BELOW.(, ADD 2 SAVE 10%, ADD 4 SAVE 15%, ADD 9 SAVE 20%!!!!!!!!!!!!