Purenex 1S-20BB-1C-20BB 2 Cartridges for 20-Inch Big Blue Whole-House Water Filters</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Block Activated Carbon filters - 20" Big Blue</li><li>Melt-blown Polypropylene Sediment filters - 20" Big Blue</li><li>individually wrapped， packed in 2 PCS per carton</li><li>Micron rating: 5 Micron</li><li>Dimensions: 20" x 4.5"</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/415og2R2HcL.jpg' noproxy></br>