Check the listing for details. Cat Pheromones Calming Diffuser 120 Days Non Toxic SEALED NEW. Condition: New. Listed at 26.99 USD. The Cat Pheromones Calming Diffuser is a non-toxic and sealed product specifically designed to help calm cats. It releases pheromones that mimic the natural calming agents produced by cats to help reduce anxiety and stress. This diffuser is effective for up to 120 days and provides a peaceful environment for cats to relax and feel comfortable. With this product, pet owners can help alleviate their cat's stress and promote a sense of well-being in their living space.