Simply breathe slowly and evenly, and Aerochamber does the rest. By providing a chamber in which the aerosol slows down and mixes with air, Aerochamber delivers the medication to the recesses of your lungs where it is needed the most. Its small size and plastic shell make it perfect for use at home or on the road. Washable and reusable and will last a long time. Aerochamber measures 6" in length and 1.75" in diameter.