[Perfect Compatibility] - The replacement cat fountain filters are compatible with 84oz Dockstream wireless cat water fountain models PLWF005, PLWF115, and PLWF105. (Filter size: 3.78 x 2.28 x 0.39 in | Sponge size: 1.37 x 1.18 x 0.35 in). [Premium 12 Pack Filters + 12 Pack Sponges] - Package includes 12 replacement filters and 12 replacement pre-filter sponges. Each set is individually packaged and sealed to maintain quality. [4-Layer Vertical Filtration] - 1. Ion exchange resin removes heavy metal ions and softens water. 2. Activated carbon reduces odors. 3. Non-woven fabric captures impurities and pet hair. 4. Built-in pump sponge helps filter debris to prevent blockages and protect the pump. [Replace The Filter Regularly] - Multi-layer filtration helps remove contaminants and provides clean, fresh-tasting water. For best performance, replace filters every 2 to 4 weeks. Clean the fountain and change the filter more frequently if you have multiple pets. [Optimal Usage] - Soak the filter for 5 minutes and rinse before use to reduce activated carbon dust, which is not harmful but may appear in water initially. Color: White + Black Material: Non-woven fabric Package Contents: 12 x Replacement Filters 12 x Sponges Note: Light reflection and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.