Filter size is 5 x 5 inches, inner circle diameter is 1.45 inches. Compatible with the pet fountain and adapts to any pet fountain. other pet fountains of the same size, please check the size before purchasing. high quality activated carbon, sufficient for use from 6 to 60 minutes. 12 months.Activated carbon and ion-exchange resin to filter hair and debris, remove odors and soften water for better tasting water water.It is recommended to replace it every 2 to 4 4 weeks to keep the water clean and fresh.Please rinse before use to prevent the activated carbon powder from falling into the water.
