Fits: TMULTRA, TMULTRA-ERP, TMULTRA-ERP-L, backwards compatible with earlier Ultra models. Removes up to 99% of iron, hydrogen sulfide, chloramines, chlorine, herbicides, pesticides, chemicals, heavy metals, pharmaceuticals, microplastics, and other contaminants that create foul tastes and odors The Cold UV LED Sterilizer safely destroys or inactivates 99.99% of microorganisms, viruses, bacteria and fungi. EPA Est. #97952-AZ-1 Easy DIY Replacement - No wrenches required Granular media allows highest possible pressure to reach the RO membrane. More pressure = greater efficiency, more, cleaner water with less waste