Comes with 5 pieces. One extra is included as a bonus. [Product Overview] GEX Pure Crystal is a lower urinary tract filter designed to maintain the health of cats. It is specifically equipped with the necessary functions to support urinary tract health. [Filter Features] This is a whole-type filter, effective in keeping the water your cat drinks clean. In addition to 4 filters, 1 extra filter is included, allowing for long-term use. [How to Use] The filter is easy to replace, and regular replacement protects your cat's health. Instructions for use are included on the package, making it easy for beginners. - Brand: GEX - Product Name: Pure Crystal - Type: Lower Urinary Tract Filter - Quantity: 4+1 pieces - Material: PP - Country of Manufacture: Thailand - Filter Shape: Circular Thank you for viewing.