Check the listing for details. TriOak Cat Pheromone Diffuser Refill 4 Pack Calming 48ml 1.6oz Each for Cats Kit. Condition: New. Listed at 31.15 USD. *OPEN BOX Description: TriOak Cat Calming Pheromone Diffuser Refill 4-Pack designed to help support a calm and relaxed environment for cats experiencing stress or anxiety. Each refill vial releases synthetic feline pheromones that help promote a sense of comfort and security, especially useful during changes in environment, travel, multi-cat households, or loud/noisy situations. * Brand: TriOak * Type: Calming pheromone diffuser refill * Pack size: 4 refill vials * Volume: 48 mL (1.6 oz) per vial * Total volume: 192 mL (6.4 oz) * Designed for plug-in pheromone diffuser systems (compatibility may vary by model) Helps create a more peaceful home environment for cats by supporting natural calming behavior signals.