Aero Chamber Plus spacer is a simple and effective way to help improve the use of your inhaler. Spacer help to ensure that your medicine reaches your lungs where it?s needed and limits the amount that ends up in the back of the throat. The yellow aero chamber (child) is suitable for most children from 1 to 10 years. The blue aero chamber is the adult spacer suitable for over 10 years. The blue aero chamber also comes with a mouthpiece and no mask.