This fits your .

Dimensions: 4 inches round by 4 inch tall. We use this same Silver Impregnated Filter Element in our Family Emergency Water Filter System This filter will replace: SHTFandGO CT 4.0, H2O2.0 and 3.0, Gravi-Stil, DIY Kits, Zen Water systems, Dalton, Berkey, and many others. This filter does not have carbon in it for long term storage. If you want carbon please copy and search for Product B01KU1QZFW

SHTFandGO Ceramic Dome Water Filter Element with Silver for Anti-Bacterial Purification (1) - B01DN7NT6S