Water filter replacement for Pioneer Plastic Pet Fountains By NISPIRA, 12 filters Premium qulaity of 12 replacement water filters compatible with Pioneer Raindrop Plastic fountain and the Fung Shui Plastic Fountain Filter helps to capture hair, debris and remove odor from the water Contains food graded activated charcoal granules inside the chamber Suggested to replace the filter 2 - 4 weeks Dimension: 5 x 0.2 x 2.5 inches. Quality meets or exceeds leading national brands.