Red Sea NanoMat Fleece Roller Filter Feutures:Plug & Play, drop-in installationSuitable for Red Sea & standard 4″ filter sock and for max nano G2 SystemsEasy fleece-mat replacement system59′ efficient, high-flow, skimmer friendly, nonwoven polyester fleece-mat rollsAutonomous Drive-Unit (No App or internet).Solid-State,Auto-Advance and high-water level sensors (No moving partes).Auto Shutdown to prevent fleece wastageNote: Suitable for seawater aquariums only.53 galRecommended for systems up to250 galMax. flow capacity per hour3.94×3.54×16.14Dimensions