These are small plastic mouthpieces that are easily removable and washable.They fit the following BACtrack Breathalyzers: BACtrack Select S30 Breathalyzer BACtrack Select S50 Breathalyzer BACtrack Select S70 Breathalyzer BACtrack Element BACtrack S75 Pro Breathalyzer BACtrack Select S80 Professional Edition Breathalyzer Each order is for a Pack of 50 mouthpieces.
