1 × 12-month CBM filter. 2 × 6-month CF filters. ⚡Long Lifespan & High Capacity. Actual filter lifespan may vary based on local water quality and usage. This bundle combines a2–5μm carbon filter and a1–3μm mineralized carbon block to effectively reduce contaminants — including colloids, sand, rust, chlorine, odor, and unpleasant tastes.