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Did we mention backflow
it eliminates excessive air flow
Entertaining
An amazing NASA science kit for unearthing real meteor fragments and special space vehicles
Rossmax Aero Spacer | Valved Holding Chamber Size:Medium Did we mention backflowHigh efficiency one way valve for easy inhalation andexhalation Universal Backpiece, can be used with all commonly prescribedMetered Dose Inhalers Anti static spacer improves the delivery of MDI by inhibitingthe adherence of drug to spacer wall Soft and flexible silicone mask provides comfortable touchand reliable seal Portable design & easy holding Easy disassembled and reassembled for cleaning Mouthpiece cap can protect the mouthpiece from dirt