PUREAL Pure & Real Water SPECIAL TECHNOLOGY WITH SLIM DESIGN FilterPUREAL Replacement Filter1st stage : Composite Carbon Block filter 2nd stage : Electro Positive Membrane filter 3rd stage : Silver Carbon Block filter FilterPUREAL Premium Replacement Filter1st stage : Sediment & Carbon block filter 2nd stage : Electro positive membrane ACF filter 3rd stage : Silver carbon block with Heavy metal agent filter FilterPUREAL Sterilizing Filter set