safetway (one way valve) mouthpieces / box of 200

DESCRIPTION

• One way valve
• These also fit the PonyFX Turbine now, size 28mm inside - 30mm outside
• Suitable for Vitalograph Alpha
• Protects the subject from cross-infection.
• Suitable or expiratory maneuvers with peak flow meters and spirometers.
• One-way valve prevents inhalation respiratory maneuvers.
• Attractively priced.
• Completely disposable.