This filter set is designed for the Zoi Rho Pure system and also replaced the filters (less UV bulb) on the Zoi Sigma system. The standard size filters work in most reverse osmosis systems available as well, and includes a 5 micron sediment filter, a GAC filter, a 5 micron carbon block filter, an inline DI filter, an inline pH filter, an inline AlkaMag alkaline filter, and an inline GAC taste & odor polishing filter. Reverse osmosis systems require regular filter changes to protect the membrane and ensure clean water. Problems relating to decreased performance and constant drain water may also be solved by replacing your filters. Product Features10" 5? Sediment5 micron sediment filter for particulate10" GA Granular activated carbon for chloramine, tastes, and odors10" Carbon Block5-10 micron carbon block filter for chlorine, tastes, and odors Inline DI Filtered-ionizing filter with 1/4" quick connect fittings removes 99% of all contaminates Inline pH/mineral Filter Calcite filter for acid neutralization and addition of beneficial minerals with 1/4" quick connect fittings Inline AlkaMag Alkaline Filter11 stage filter includes Calcite filter for acid neutralization and addition of beneficial minerals with 1/4" quick connect fittings Inline Post Filter Polishing filter with 1/4" quick connect fittings for superior taste Standard Size Prefilters Sediment, carbon, & GAC fit in standard 10" filter housings, approximate dimensions: 9.75"x2.5"Product Description This filter set is designed for the Zoi Sigma Pure system. The standard size filters work in most reverse osmosis systems available as well, and incl