Still Spirits EZ Replacement Filter Fast, clean, easy to use. Contains one replacement cartridge for EZ Filter System or EZ Inline Filter, specifically designed for the maximum purification of alcohol or water. Laboratory tests prove that the carbon improves the spirit from the T500. It's important to still carbon treat when using the T500 in order to get the very highest quality finished spirit. The cartridge eliminates the need to handle powdered or granulated carbon. The cartridge's porous design allows the spirit or water to pass through and the unwanted flavours or chemicals to be absorbed by the activated carbon. It is fast, clean and easy to use. Each cartridge is suitable for one batch of alcohol from a 25L still or 300L of water.