- Wide Compatibility: Designed to fit 2.0, 2.8, and 4.0-liter drinking fountains, our filter is specifically tailored for 2.5L cat fountains. It ensures a reliable fit for popular models, making it ideal for 67, 95, and 135 oz systems, and optimized for 84 oz setups. - Precise Construction: With accurate dimensions, this filter guarantees easy insertion and a stable hold without gaps. It is specifically designed to fit typical filter holders in pet waterers, ensuring secure placement. - Multipurpose Filter Solution: This special 8-pack features advanced pre-filter technology to extend change intervals. Whether you have a single cat or multiple cats, it maintains crystal clear water in various environments. - Advanced Filtration System: The multi-layer filtration includes an activated carbon filter that reduces unwanted odors, an ion exchanger that removes heavy metals, and filter fleece that captures particles. This continuous water treatment ensures your pet always has access to fresh drinking water. Use Scenarios: 1. Perfect for busy households with multiple pets, ensuring fresh water without frequent filter changes. 2. Ideal for cat owners looking to improve their pet's hydration with clean, odor-free water. 3. Suitable for use in both standard and larger capacity water fountains, providing versatility for different pet needs.