The Pacific Coast Imports GenX GX2400 Submersible Needlewheel Pump is intended for use with protein skimmersComes with needlewheel impeller and air inlet attachmentFlow rate: 633 gph40 WattsDimensions: 4.8" X 3.15" X 4.33"Can be used as a submersible or external pumpUL approved9 foot power cordCeramic shaftAdjustable flow control