For use with the Keurig Water Filter Starter Kit. Includes 2 replacement water filter cartridges (4 month supply). For best results replace water filter cartridge every 2 months or 60 tank refills and continue to de-scale your brewer regularly. For use with the Keurig Water Filter Starter Kit (Sold separately at select retailers and www.keurig.com). Product may differ slightly from pictures on box. www.keurig.com. Made in Germany. Printed in Germany.