The a2a spacer is a pocket sized valved holding chamber and is collapsible for improved portability a2a spacer is made from anti microbial low static transparent plastic for improved hygiene designed for single patient use when open a2a has a volume of 210ml but when closed it is highly portable product features and benefits collapsible pocket sized easy to clean inhibits microbial growth low static properties ensures that essential medication does not stick to the chamber visible va