Hydro Logic Stealth RO Pleated Sediment FilterSediment Filters are the standard sediment pre filter that come with many reverse osmosis systems. The Sediment Filter will remove silt, rust, sand, etc. These filters are pleated and cleanable. These filters work with Hydro Logic systems as well as Ideal H2O. Match the filter to the size of your reverse osmosis system. Most filters last 6 12 months with regular cleaning. Due to manufacturing process, filter colors may vary.