SOLID AIR give you 25-35% more fragrance than other competing gel products currently on the market. SOLID AIR will freshen any space for a full 30 days. Use it in restrooms, lobbies, conference rooms, or anywhere needing a boost of fragrance.. SOLID AIR •Environmentally safe •No breaking or spilling. •100% Recyclable. ULTRA SOLID AIR Fits a wide variety of dispensers and fan cabinets such as Nilodor's Airofresh Pulse Dispenser or these others: Big D®, Contico®, Hospeco®, GA Pacific®, F-Matic®, Fresh®, Rubbermaid TC® & Time Mist®.