Aero chamber for Children and Adult is a High efficient one-way valve for easy inhalation and exhalation. Universal Backpiece, can be used with all commonly prescribed Metered Dose Inhalers, Anti-static spacer improves the delivery of MDI by inhibiting the adherence of the drug to the spacer wall. A soft and flexible silicone mask provides a comfortable touch and a reliable seal Portable design & easy holding. Easily disassembled and reassembled for cleaning. The mouthpiece cap can protect the mouthpiece from dirt and debris when the device is not in use This product contains no latex and is BPA-free. available in 3 sizes Small up to 2 years , medium from 2 years to 5 years ,large more than 5 years For single-patient use only.