Scented oil refill provides continuously diffused and carefully blended fragrance throughout your room for up to 45 days. Fresh linen scent combines the subtle fragrances of green apple, crisp linen and fresh air to create a welcoming atmosphere. Scented oil is perfect for use in hotels, motels, healthcare facilities, nursing homes, office buildings, restrooms and more. Refill is designed for use with Airwick scented oil warmers (sold separately).