• Wide compatibility: Designed to fit most cat fountains of 2-2.5 liters. Dimensions: outer diameter 125 mm, inner diameter 37 mm, thickness 10 mm. • Advanced filtration: Includes ion exchange resin and activated carbon for superior filtration, removing heavy metals and odors. • Easy to use: Rinse the filter for 10 minutes before use to remove carbon dust. Place the flat side up for optimal filtration. • Recommended replacement: Change the filter every 2-4 weeks to ensure continuous and effective filtration protection. • Triple protection: Effectively filters hair, dirt, and sediments with a high-intensity double cotton mesh. • Coconut activated carbon: Removes residual chlorine and improves water taste, encouraging pets to drink more. • Product measurements: Width 12.5 cm, Height 0.8 cm, Length 12.5 cm, Weight 0.12 kg.