Description If you are looking for a professional and effective odor filters for your cat litter box, then your research is over here. Thats because our filter pads can meet your need. Made of active carbon, our filter pads have a better performance in odor filter while having no bad effects on your cats. Features -Color: Black. -Material:active carbon -Size: About11.50X10.50X0.50cm/4.52X4.13X0.20in - Strong absorption: These odor filters have a powerful odor absorption ability, can effectively purify the stench of cat waste. - Durable: The effect of odor filter can last for a long time, so you don't need to replace it often, saving much time. - Proper size: With their proper sizes, these odor filter pads can fit most types of cat litter boxes, and they are free to trim. - Keep fresh: These filter pads can keep the room fresh and improve indoor cleanness, are essential supplies for cat owners. -Easy to use: The replacement only takes a few seconds. All you have to do is open the lid and remove the old one to replace. Package List18 x filter pads