This 10” Clear Water Filter Housing Canister for Reverse Osmosis Filtration Systems RO and RODI Units is great for anyone that wants to add more filtration to their RO or RODI system. A standard RO/DI system will have three vertical canisters and a RO membrane on top. By installing our canister you can add an additional pre-filter sediment cartridge, carbon block cartridge, DI cartridge or Chloramine and/or VOC removal cartridge. Bracket not included