Check the listing for details. Waterdrop WD-A1-CF Filter,Replacement for WD-A1 Reverse Osmosis water Dispenser. Color: White, Condition: New. Listed at 41.99 USD. Compatible with Waterdrop A1 Hot and Cold Reverse Osmosis System.3-Layer Filtration: Our advanced filtration technology combines PP cotton, a carbon rod, and a scale inhibitor to effectively remove impurities, chlorine, and scale from your water. Note: This data is from a third-party lab.Long-lasting Performance: This CF filter is designed to last 6 months and provides consistent quality and reliability without frequent replacements.3s Easy Replacement: Engineered for user-friendly installation, this filter can be quickly and easily replaced, saving you time and effort.Safe and Durable Materials: This filter is made from BPA-free, food-grade materials, guaranteeing user safety, sturdiness, and overall long-lasting filtration performance.3s Quick ReplacementThe filter of this reverse osmosis water filtration system is very easy to install. Installation takes 3 seconds and requires no tools or plumbing experience.6-month Long LifespanThis CF replacement filter has a long-lasting filter life of up to 6 months. Replacement will be less frequent, saving you time and money in the long run.Strict Test, Outstanding QualityThis high-quality replacement filter is suitable for households with diverse water needs. It has passed 100,000 water hammer tests, demonstrating its capability to provide healthy purified water always.