Katadyn Gravidyn Replacement Element Dual filtration element Drip offers ceramic Activated Carbon filtration Eliminates odors and chemicals in water Replacement filter for select Katadyn water filters Restores your filter to working order after clogging Field-cleanable 0.2-micron ceramic element Filters up to 13,000 gallons of water 1-gallon-per-hour flow rate; weighs 1 pound 8 ounces