Eco-Air refill outperforms gels, wicks and aerosols using a unique, citrus fragrance designed for consistent, powerful, 30-day performance. Eco-Air is freshness made simple. Solid refill is infused with natural fragrance oils so the air you breathe is chemical-free - no messy gels or liquids. Eco-Air works great in conference rooms, entryways, restrooms and trash rooms. Simply mount the dispenser (not included) on the wall near a door so the natural airflow spreads the fragrance throughout the space. Use in Fresh Products Eco-Air dispensers (not included).