Additional Details ------------------------------ Product description: QMP540 is a backwashing shower filter that is disposable. Our filter has been shown to effectively remove damaging chlorine, iron, and sulphur at the source as well as help keep mold and mildew from forming in your shower.Our streamlined design allows for more head room and has a unique back-wash feature which will reverse the flow of water to remove any sediment buildup that can cause other filters to fail prematurely.To install, simply unscrew your existing shower head from the shower arm and screw on the new shower filter.(Showerhead Included)?Dimensions: 6.7" tall X 3.75" diameter?Housing material: ABS plastic?Inlet: 1/2" female pipe thread, swivel