Drager Alcotest 3820/4000 MouthpiecesDrager Alcotest 3820 4000 mouthpieces enables personal use anywhere, anytime. This gives the user great flexibility to share the device amongst friends and colleagues without sharing mouthpieces. Box of 5 replacement mouthpieces. Hygienic and individually wrapped. These mouthpieces are specific to the Drager Alcotest 3820 model ONLY. *Please note: If you are looking for a cost effective solution to buying mouthpiece replacements. The Drager universal