COMPATIBILITY & SUPPORT : This 6-pack filter set is designed specifically for the 84oz/2.5L Cordless Pet Drinking Fountain, ensuring a and functionality. If you experience any issues, our supportive customer service team is on standby 24/7 and offers a strong 12-month replacement . ADVANCED 4-STAGE FILTRATION: Our replacement filters feature a comprehensive four-layer filtration system. Non-woven fabric captures hair and dirt, activated carbon eliminates odors and tastes, filter stones remove heavy metals and add beneficial trace elements, and ion exchange resins soften tap water to improve overall water taste. PRE-FILTER SPONGE FOR ENHANCED PUMP PROTECTION: Each filter includes a high-density pre-filter sponge that captures fine debris and impurities. This feature not only maintains cleaner water, but also protects the pump, significantly extending its lifespan. OPTIMAL REPLACEMENT SCHEDULE FOR HEALTHIER PETS: For best results and continued purity, replace filters and sponges every two weeks. If there are multiple pets in the home, more frequent replacements may be necessary to the water provided to your pets is of the highest quality and cleanliness. INSTALLATION GUIDE FOR READY USE: To optimal performance, soak your new filter for 5 minutes and rinse thoroughly for before installation. This initial preparation prevents carbon dust from being dispersed into the fountain, ensuring your pet's water remains fresh and clean from the start. Colour:As Shown Material:Cotton Package Contents: 1x Dispenser Filter Replacement Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.