Protect Water Purifier from dirt / silt and any other visible impurities which may further move inside the Water Purifier, Dirt and sediment removal water filters. These pre filters are commonly used to remove dirt, sediment, rust, sand, grit and grass etc. Regular change of Filter protects RO Membrane and choking of other filters. It is important to change your Ro filter after a while to get rid of all the dust and chlorine taste in the water which gets clogged over a period of time. This is a high quality and widely used reverse osmosis Filter, Multilayered, Impregnated Carbon, Depth Filter, Can be back flushed, Suitable for Pre-filter Housing Bottle 9 Inch, Length is 9 inch. Polypropylene yarn wound candle, Multilayered, Impregnated Carbon, Depth Filter, Can be back flushed. Polypropylene yarn wound candle, Replace in Every 3 Months.