The Doulton W9121226 7-inch Ultra Sterasyl (Formerly ATC Super Sterasyl) 'Gravity-Fed' Ceramic Filter Candle features the combination of a microfilter ceramic outer, granular activated carbon and heavy metal removal media to effectively reduce a range of contaminants including bacteria, chlorine, pharmaceuticals, PFAS, microplastics, and heavy metals such as lead. The candle design features a domed end and a plastic-mounted top, for a perfect match every time in your British Berkefeld Doulton or other brands of gravity-fed countertop water filter systems. Retains health-giving minerals that are naturally present in your water. Reliable, fresh, clean to taste and easy to use for all the family.