KDF process media to safely reduce or remove chlorine, iron, heavy metals Significantly extend the life of the GAC. Great for municipal or well water. Effectively removes chlorine and heavy metals. Compatible with APEX RF-1030 and RF-1010 Designed to be used in most standard sized housings. Fits Standard 10" Housing for Reverse Osmosis Water Filtration Applications. Clear Filter Cartridge: 2.5" x 10" Sometimes during shipping, the media may shift. This is normal and it will not affect the working of the filter. It will still function as described. High chemical absorption capacity. Perfect solution for household of any size. Easy installation. Filter effectively removes hundreds of contaminants from water.