2L Water Dispenser Replacement Filter. 1 pack contains 6 replacement filters. Filters can help remove chlorine, impurities and odors from water, blocking hair and dirt, making your fountain water fresher and tastier. To ensure fresh and clean water, we recommend changing the filter every 2 to 4 weeks. Rinse the filter thoroughly with water before use. Filter size: 9 x 6 cm. Package: 1 set of filters (6 pieces/set). Product description This only applies to pet water fountains. 6 pieces per set, 1 set per pack. Filter size: 9 x 6 cm.