Package Quantity:250 One-way flow technology to provide the most accurate results. A non-reversible valve inside to prevent from inhaling outer air to cheat and flowing contaminated air backward. Fits for all AlcoMate brand breathalyzers. Re-useable if cleaned (for hygenic purposes). There is no negative effect on testing if the same mouthpiece is used continuously. Manufactured by AlcoMate, a global breathalyzer leader in professional alcohol testing device industry.
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