Pentek 158116 1/4" #10 Slim Line Clear Filter Housing Slim filter housing for low-flow applications with space restrictions Clear styrene-acrylonitrile (SAN) for on-site viewing of flow and cartridge condition Holds a 10" x 2-1/2" sediment or carbon filter cartridge (sold separately) Pressure relief button for easier cartridge replacement Initial pressure drop of 2 psi at a flow rate of 3 gpm