SOLID AIR give you 25-35% more fragrance than other competing gel products currently onthe 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 AIRFits a wide variety of dispensers and fan cabinets such as Nilodor's Airofresh Pulse Dispenser https://www.nilodor.com/OnlineCatalog/Airofresh_PULSE_Universal_Air_Freshening_System-b-details.aspx or these others: Big D®, Contico®, Hospeco®, GA Pacific®, F-Matic®, Fresh®, Rubbermaid TC® & Time Mist®.