Brand: GEX Pure Crystal Softening Filter Eco Semi-Circular for Cats, Pack of 8 Filter for cat water dispensers. Ionic (ion exchange resin) removes magnesium and calcium from tap water, creating soft water that is gentle on pets. Product size: Width 136 x Depth 82 x Height 150mm. Materials: PP, ion exchange resin, activated carbon. For health maintenance, replace the filter every 3 weeks to 1 month, or when visible dirt such as hair or food debris becomes noticeable. When replacing the filter, be sure to clean all parts of the Pure Crystal body and the pump to maintain cleanliness. For the filter water dispenser Pure Crystal, please use the GEX Pure Crystal dedicated filter. Product number: 4972547927835 To reduce shipping costs, the product may be sent without the box. Thank you for your understanding.