Purewell PH-2 White 3-Stage Alkaline Filter Elements, Additional filters for Berkey® Black Filters, Berkey® Gravity Filtration System and Purewell System, pH 8-9 (2 Pack, K Series)

Purewell PH-2 White 3-Stage Alkaline Filter Elements, Additional filters for Berkey® Black Filters, Berkey® Gravity Filtration System and Purewell System, pH 8-9 (2 Pack, K Series)