1 Micron 2.5″ x 10″ Whole House CTO Carbon Sediment Water Filter Cartridge,4PACK
The filter can be used in any standard 10″x 2.5″ RO Unit whole house filtration system. The filter is high-density type, which is more suitable for City Water. HOWEVER, if your water source is Well/Spring water, this filter may not reach your ideal life expectancy.