[Compatible With Berkey]: Replacement for BB9-2 Black Water Filter, Compatible With for Big, for Travel, for Royal, for Imperial, for Crown, for Light Series Gravity Filtration System. [High-efficiency filtration]: Two-stage gravity filtration with ceramic and silver-impregnated carbon block, with filtration precision up to 0.1 micron. Effectively reduces chlorine, fluorine, heavy metals, tastes and odors, sediments, and removes over 99% of large particles. [Durable Life Span]: for Berkey Water Filter Replacement, For Best Performance, We Recommend Replacing The Black Filter Every 6000 Gallons Per Pair, Depending On Water Conditions. Please Note That Tds Level Does Not Fully Indicate Water Quality And Our Filters Do Not Reduce Tds Value. [Ceramic Filter Silver Infused,]: The Water Filter for BB9-2 Replacement Uses Two-Stage Ceramic Carbon Block Gravity Feed Filtration System. It Has an External Ceramic Shell and Internal Silver-Injected Coconut Shell Activated Carbon Blocks to Ensure Excellent Filtration Performance And User Safety. Color: Black & White Material: plastic Package Contents: 2 x for BB9-2 filter element