Keep your cats off the couch with the PetSafe SSSCat Spray Deterrent Refill. This refill can be used to replace the spray deterrent in your PetSafe SSSCat Spray Deterrent device. The can contains 3.89oz of compressed air that is unscented and harmless to your pet, but effectively keeps them away from areas you don't want them. Perfect for training your cat and protecting your furniture.