CASCADE® SLC® AC PCA® insert with washers/green, Flow rate is ~ 5 l/min, stream pattrern ist aerated comfort stream, Outstanding limescale protection with NEOPERL® SLC® function: The soft elastomer surface makes it very easy for you to remove limescale deposits from the bottom of the aerator with your finger. This ensures that the water stream remains straight, splash-free and pleasant for longer. PCA® aerator models are equipped with an integral flow regulator. This keeps the flow rate practically constant, even if the pressure changes.