Activated charcoal duo filters leave water cleaner and fresher for better tasting coffee every time. Helps your brewer last longer by reducing chlorine, sediments, and impurities. Duo water filter cartridges fit most Krups coffeemakers. Water filtration reduces chlorine and sediments from water, leaving clean, fresh water for the best tasting coffee. provides longer machine life by reducing lime scale build up. Duo water filters fit most Krups coffee machine including model