[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 0.39in | Sponge size: 1.37 x 1.18 x 0.35in). [Premium 12 Pack Filters + 12 Pack Sponges] - Package includes a 12-pack of pet fountain replacement filters and a 12-pack of 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 clogs and protect the pump. [Replace The Filter Regularly] - Water passes through a multi-layer filtration system to reduce contaminants and provide cleaner, fresher-tasting water. For best performance, replace the filter every 2-4 weeks. If you have multiple pets, clean the fountain and change the filter more frequently. [Optimal Usage] - Soak the filter for 5 minutes and rinse before use to minimize activated carbon dust from entering the water. This dust is not harmful to pets. Color: White + Black Material: Non-woven fabric Package Contents: 12 x Replacement Filters 12 x Sponges Only the above package content is included; other items are not part of this product. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.