UV water sterilizer Stainless steel housing, quartz UV lamp, quality ballast. UV water sterilizer ATLAS403-LM ... , 25W, 40W, 55W, 75W - The lamp length: 310mm, 550mm, 890mm- Housing diameter: 65mm or 89mm- Water treated capacity from 0.5m3 ... span of the UV lamp: 9000hours- Inlet /Outlet conector: 1/2", 3/4" and 1"- Housing finish: polished