Waterdrop Water Filter Replacement for Philips® AquaClean® CA6903/10 CA6903/22 CA6903, Reduces Limescale and More, TÜV SÜD Certified (5)Please note: This coffee filter replacement fits your filter by entering your model number. This applies to CA6903, not CA6702. Effective filing: Lone exchange resin effectively prevents limescale deposits. Besides, the high quality activated carbon from coconut shells can absorb residual chlorine, which improves the taste of your coffee. No limescale removal: you do not need to descale the coffee machine. This coffee machine filter prevents limescale