The SDI Diagnostics Safe-T-Chek Plastic One-Way Valve Mouthpieces (Case Configuration) are premium, single-use respiratory testing accessories engineered to protect patients and pulmonary diagnostic hardware from cross-contamination during expiratory screening. Constructed from durable, medical-grade rigid plastic, these mouthpieces incorporate an internal one-way mechanical valve that instantly seals shut if a patient attempts to inhale mid-test, completely blocking the accidental aspiration of airborne pathogens left inside the machine chamber. Designed with an optimal, low-resistance internal airway, they ensure that the safety valve moves freely under positive pressure without introducing artificial backpressure or altering critical clinical peak flow measurements. The rigid plastic construction maintains full structural integrity under intense patient lip or teeth clamping to provide a secure, leak-proof perimeter seal, making them an efficient alternative to traditional cardboard versions. This specific product code designates the master case configuration, supplying a bulk quantity of 600 total mouthpieces packaged internally as three boxes of 200 units.
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