Features: WHAT YOU WILL GETYou will receive 6pcs cat litter box filter, enough for daily use and replacement needs. The filter pad diameter is about 29.7cm/11.69inch, width is about 7cm/2.76inch. APPLICABLE MODELSLitter box filter fits for Litter-Robot 4, please confirm the model before purchasing. They are ideal essentials, easy to install. Direct fit, the filter can be easily removed and replaced. ACTIVATED CARBON FILTERThis is an activated carbon filter with millions of tiny holes, creating a larger surface absorption space and helping to capture more gaseous compounds, better absorbing cat litter odor. GOOD LIVING FOR CATActivated carbon filter has an excellent odor absorption effect, ensuring that the cat litter box is dry and odor-free, providing a fresh, comfortable and happy living environment for cat. REPLACEMENT PARTIn order to achieve better odor absorption effect, you can replace the activated carbon filter of the cat litter box every month. This time period may vary depending on your cat's usage patterns. Description: 1. It fits for Litter-Robot 4, easy to install. Direct fit, the filter can be easily removed and replaced. 2. Activated carbon filter with millions of tiny holes, the flexible carbon filter works to absorb unwanted odors. 3. Ensuring that the cat litter box is dry and odor-free, providing a fresh, comfortable and happy living environment for cat. Specifications: Color: black Material: activated carbon Application: fit for Litter-Robot 4 Diameter: about 29.7cm/11.69inch Width: about 7cm/2.76inch Thickness: about 0.5cm/0.20inch Package Includes: 6pcs x Cat litter box filter Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.