These filters help for efficient absorption of litter for cat odours with their zeolite particles that trap ammoniac odor molecules on contact. These filters last up to 3 months. They are non-toxic and easy to load in your litter. Made in USA. This product contain one filter. This product is compatible with litter boxes: - closed litter box - Giant sifting enclosed litter box - translucent super-giant enclosed litter box
