10 inch 5 sediment 5 micron sediment filter for particulate 10 inch GAC granular activated carbon for chloramine, tastes, and odors 10 inch carbon block 5-10 micron carbon block filter for chlorine, tastes, and odors inline post filter polishing filter with 1/4 inch quick connect fittings for superior taste inline alkaline filter alkalinity filter raises ph creating alkaline water and providing beneficial minerals with 1/4 inch quick connect fittings standard size prefilters sediment, carbon, & GAC fit in standard 10 inch filter housings, approximate dimensions: 9.75"X2.5" replacement filter set for zoi zeta pure systems. Fits most common 6-stage alkaline drinking water ro systems. Also works for zoi iota pure and 7-stage uv+ak drinking water ro systems. Standard filter size fits common 10 inch housings. Filters should be replaced at least Once a year, every 6 months is average for most homes. Does not include the ro membrane