1 diffuser + 1 refill 48ml.Feliway Friends mimics the pheromone calming motherly feline produced by the cat during the nursing of her kittens. This pheromone is known for its soothing properties and for its ability to strengthen the emotional ties. Regardless of the age of the cat, this pheromone provides a calming effect that helps the cats of the household to better accept themselves.