Malida RO Water Filters 1/4"Male, Drain Saddle, Nuts Inclfor Reverse Osmosis (Ro) Systems 1/4"Male, Drain Saddle, Nuts Incl.Made to fit on drain line between trap and sink basin May come in black or white, both fit the same 1/4" connect fittings allows easy tubing conections Fits on drain pipes up to 1.5" in diameter Drain saddle valve used with reverse osmosis (RO) systems