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The AlcoSense Professional Mouthpieces are designed to comply with the strict EN16280 and NF standards which require the mouthpiece to be individually sealed and feature a one-way valve for ultimate hygiene and accuracy. Keep your AlcoSense Breathalyzer in mint condition with our great value universal carry case. Designed to work with all AlcoSense Breathalyzers. Suitable for Lite, SE, Zero, Elite, Excel, Pro and Ultra