Bosch replacement water filter 640565, AP3961137, B20CS5, CS-452, CS52, EVOLFLTION 10/500/800 SERIES 100% recyclable, made in U.S.A. SGF-BO52 Provides clean, high quality, great tasting water. All products made in USA and Canada. Gold seal WQA certified. Meets NSF/ANSI 42 standard. Environmentally friendly and ethically produced. Free of arsenic, lead and BPA. Filter Applications: sediment, dirt and rust, chlorine taste and odor, 95% lead, 99% cysts, 95% turbidity, 95% asbestos, 95% atrazine, 95% mercury We offer a 100% money back guarantee. All our products are 100% hand tested. Sold worldwide.