SecureCat Home 30 day refill is a passive diffuser refill that releases Feline Facial Pheromone (F3) to help cats adapt to common household changes. It supports overall well-being during adoption, new environments, visitors, and other disruptions in the home. Each refill includes 8 biodegradable diffuser sticks and a bottle of pheromone solution for continuous 4-week diffusion in spaces up to 645 sq. ft. Requires the tip-resistant glass vase from the Starter Kit and is suitable for all breeds and ages with no side effects or drowsiness. An easy, non-sedating cat calming aid for everyday behavior support.