Compatibility: ONLY compatible with PETLIBRO Dockstream Cat Water Fountain models PLWF105, PLWF115, and PLWF005. Please verify product dimensions if uncertain. Easy to Install and Clean: These replacement filters are simple to install and remove, saving time during cleaning. Soak the filter and sponge in water for at least 3 minutes before first use to activate optimal filtration performance, then rinse thoroughly under running water. Helps maintain fresh water for your cat over extended periods. Healthy Filter Ingredients: Triple-stage filtration system includes activated carbon, ion exchange resin, and non-woven fabric. Effectively reduces impurities such as pet hair and heavy metals while improving water taste and quality. High-quality replacement filters support your pet’s health by providing clean, fresh water daily. Premium 12-Pack Replacement Filters: Includes 12 premium replacement filters and 12 pre-filter sponges, sealed for freshness and quality. Designed to last 3 to 12 months depending on usage. Replace pre-filter sponges every 2 to 4 weeks for best results. Filter Sponge & Pump Sponge: High-density pre-filter sponge captures fine debris to enhance filtration efficiency. High-density pump sponge protects the internal pump by trapping particles, helping extend the lifespan of the fountain. Product Benefits: Reduces impurities, maintains water freshness, supports hydration. Color: As shown in photo Material: Cotton-based fabric (non-woven) Package Contents: 12 x Replacement Filters 12 x Pre-Filter Sponges Note: This package includes only the items listed above. Image color may vary slightly due to lighting and screen settings. Measurement tolerance is +/- 1-3 cm.