The EZ filter uses a specially formulated, solid activated carbon cartridge, to remove unwanted flavours from distilled alcohol. The cartridge eliminates the need to handle powdered or granulated carbon. The cartridge is porous to allow the spirit to pass through and the unwanted flavours to be absorbed by the activated carbon. A high quality result has never been easier. For those of you currently using the Z filter, the EZ In-Line Filter is an easy upgrade and can be used with your existing pails. No more messy carbons!