Check the listing for details. Comfort Zone Cat Calming Diffuser Kit with 3 diffusers and 6 refills. Condition: New. Listed at 59.99 USD. Comfort Zone Cat Calming Diffuser Kit with 3 diffusers and 6 refills. Kit includes 3 diffusers and 6 refills. Please note that the product information displayed is provided by manufacturers, suppliers and other third parties and is not independently verified. What you see as "bad behavior" such as urine marking or destructive scratching, may actually be your cat acting out due to stress. - Veterinarian Recommended, #1 Brand in Pet Behavior Management - Proven 95% effective for reducing urine marking - Proven 93% effective for limiting destructive scratching - Creates a calming environment for your cat and will not affect other household pets - New & improved diffusion system and formula - Drug free, unscented refill lasts up to 30 days and covers 1 room Condition is "New".