The Omnipure K-Series K5520 inline filter is a 1 micron carbon block inline filter. This filter can be used as a post R.O. filter. The filter has 1/4 QC fittings. This filter can also be used in ice makers, refrigerators, beverage equipment, drinking fountains, under the counter systems, R.O.Systems and in conjunction with purification systems. It also aids in the removal of sediment, taste, odor and chlorine. Additional Details ------------------------------ Product description: The Omnipure K-Series K5520 inline filter is a 1 micron carbon block inline filter. This filter can be used as a post R.O. filter. The filter has 1/4 QC fittings. This filter can also be used in ice makers, refrigerators, beverage equipment, drinking fountains, under the counter systems, R.O.Systems and in conjunction with purification systems. It also aids in the removal of sediment, taste, odor and chlorine.