... activated carbon water filter cartridge GAC is filled with carbon with high iodine rate,the carbon can be coal carbon,coconut carbon,fruit shell carbon,depends on ... .It can remove chlorine,pigment and odors.Filter Media:Activated Coal Carbon/Coconut Shell Carbon/Fruit Shell carbon with high iodine rateGasket:Silicon,EPDM ... /Inner diameter:2.5”,4.5” /28mm 20" granular activated carbon filter cartridge